If it's not what You are looking for just enter simple or very complicated fractions into the fields and get free step by step solution. Remember to put brackets in correct places to get proper solution.

The common denominator of the two fractions is: 84

$ \frac{3}{28 }= \frac{(3*3)}{(3*28)} =\frac{ 9}{84} $

$ \frac{1}{21 }= \frac{(1*4)}{(4*21)} =\frac{ 4}{84} $

Fractions adjusted to a common denominator

$ \frac{3}{28 }+\frac{ 1}{21 }=\frac{ 9}{84 }+\frac{ 4}{84} $

$ \frac{9}{84 }+\frac{ 4}{84 }= \frac{(4+9)}{84} $

$ \frac{(4+9)}{84 }=\frac{ 13}{84} $

$ $

| (x)/(7)-(2)/(7) - subtraction of fractions | | (14)/(15)+(13)/(20) - adding of fractions | | (6)/(11)+(1)/(22) - adding of fractions | | (14)/(9)+(7)/(6) - addition of fractions | | (1)/(x)*(1)/(x+1) - multiply fractions | | (13)/(35)+(5)/(21) - add fractions | | (7)/(10)+(8)/(25) - add fractions | | (-3)/(4)/((2x-3))/(20) - divide fractions | | (19)/(14)+(6)/(21) - adding of fractions | | (5)/(8)+(1)/(26) - addition of fractions | | (13)/(20)+(1)/(6) - addition of fractions | | (25)/(24)-(19)/(16) - subtract fractions | | (4)/(5)+(7)/(20) - addition of fractions | | (7)/(3)*(3)/(14) - multiplication of fractions | | (4)/(5)+(16)/(20) - add fractions | | (4)/(5)+(16)/(20) - adding of fractions | | (-15)/(2)*(1)/(100) - multiplication of fractions | | (13)/(18)-(5)/(9) - subtraction of fractions | | (10)/(8)-(5)/(4) - subtract fractions | | (11)/(15)-(18)/(25) - subtract fractions | | (7)/(15)-(3)/(25) - subtract fractions | | (1)/(9)-(1)/(36) - subtraction of fractions | | (2)/(3)-(4)/(6) - subtract fractions | | (23)/(12)-(5)/(6) - subtraction of fractions | | (2)/(7)-(5)/(8) - subtraction of fractions | | (2)/(7)+(5)/(8) - addition of fractions | | (44)/(9)+(16)/(3) - addition of fractions | | (67)/(10)+(393)/(100) - add fractions | | (6)/(10)+(93)/(100) - addition of fractions | | (61)/(10)+(393)/(100) - addition of fractions | | (5(2m-7)+8m)/(2)+(17)/(2) - addition of fractions | | (5(2m-7)+8m)/(5)+(17)/(2) - adding of fractions | | (3)/(4)+(1)/(24) - add fractions | | (7y)/(8)/(-9)/(5y) - divide fractions | | (-11a)/(4)+(11)/(8a) - adding of fractions | | (7)/(2)/(8)/(7) - dividing of fractions | | (-8)/(-5)/(7)/(5) - divide fractions | | (11)/(12)/(11)/(4) - dividing of fractions | | (a)/(7)-(5)/(7) - subtract fractions | | (13)/(56)+(5)/(7) - adding of fractions | | (5)/(16)-(1)/(20) - subtraction of fractions | | (1)/(5)+(3)/(20) - adding of fractions | | (5-2)/(3)+(2-2)/(4) - adding of fractions | | (x-2)/(3)+(x-2)/(4) - adding of fractions | | (7)/(1/4)*(1)/(18) - multiplication of fractions | | (13)/(56)+(5)/(7) - add fractions | | (2)/(15)-(1)/(20) - subtraction of fractions | | (35)/(36)*(6)/(7) - multiplying of fractions | | (150)/(45)+(180)/(45) - adding of fractions | | (150)/(45)*(180)/(45) - multiplication of fractions | | (2)/(5)+(1)/(9) - adding of fractions | | (10)/(81)+(25)/(72) - adding of fractions | | (2a)/(15)-(1)/(3) - subtraction of fractions | | (7)/(9)-(14)/(45) - subtraction of fractions | | (12)/(15)/(6)/(5) - dividing of fractions | | (2)/(7)/(10)/(3) - dividing of fractions | | (9)/(1)*(1)/(5) - multiplying of fractions | | (12)/(7)*(9)/(8) - multiply fractions | | (1)/(4)*(2)/(1) - multiplication of fractions | | (4)/(1)*(1)/(16) - multiplication of fractions | | (1)/(16)*(1)/(16) - multiplication of fractions | | (1)/(3)+(7a)/(8) - adding of fractions | | (16)/(1)*(25)/(36) - multiplication of fractions | | (12)/(1)*(4)/(3) - multiplication of fractions | | (12)/(1)+(4)/(3) - addition of fractions |

- Equations solver - equations involving one unknown
- Quadratic equations solver
- Percentage Calculator - Step by step
- Derivative calculator - step by step
- Graphs of functions
- Factorization
- Greatest Common Factor
- Least Common Multiple
- System of equations - step by step solver
- Fractions calculator - step by step
- Theory in mathematics
- Roman numerals conversion
- Tip calculator
- Numbers as decimals, fractions, percentages
- More or less than - questions

3x 4y 10 2sin x cos x derivative of calculator 24.99 to dollars 5x 2y 20 derivative ln 2x roman numerals 1972 24.99 to dollars 2019 in roman numerals 4y 6x 2 multiply and divide fractions calculator solving problems with percents calculator decimals fractions percents 299-100 least common denominator calculator solving equations fractions calculator derivative of x a 39.2 is what percent of 112 hcf of 72 r sin 2theta 5x squared 5kg in pounds 4x 2y 12 secx move solve tan2x 1 1981 roman numerals 18kg in lbs derivative calculatore 2nw prime factorization of 189 3pi 4 20 qt to gal multiplying fractions calc graph x 2 4x multiplying 3 mixed fractions calculator 20x125 5xm what is the gcf of 64 and 96 whats a gcf 3x 5y first 3 common multiples of 9 and 21 prime factorization of 114 sin4x 0 simplify x 2 4x 3x 7y 2 for y 100-81 simplify 2x 2 3x 2 derivative of ln 1 2x how to write 5000 in roman simplify 3n x 2p sinc0 finding least common denominator calculator derive sin 2x 1.0e-3 2cosxsinx 2ci experience 63-14 graph 2x 5y 10 common multiples of 9 and 6 3.25 as a fraction 5000 roman numerals v2 u2 2as how to change fractions to decimals x3 y3 factor expression calculator with steps 2 sin 2x sinx 8y y8 1994 roman numerals gcf solver 603-6 least common denominator calculator with variables finding least common denominator calculator 3x 2y 24 derivative of ln 9x 86x or 64x 5 sqrt 3 ln 3x derivative prime factorization 162 2x3 3x2 2x2 3x 5 2x 5y 20 roman numerals xy what is the lcm of 8