Answers

Add 28/21 and 42/36

1^st number: 1 7/21, 2^nd number: 1 6/36

28/21 + 42/36 is 5/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 21 × 12 = 252,
   28/21 = 28 × 12/21 × 12 = 336/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   42/36 = 42 × 7/36 × 7 = 294/252
4. Add the two like fractions:
   336/252 + 294/252 = 336 + 294/252 = 630/252
5. 630/252 simplified gives 5/2
6. So, 28/21 + 42/36 = 5/2
   In mixed form: 21/2

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁵⁶/₂₁+⁴²/₃₆ ²⁸/₂₁+⁸⁴/₃₆ ²⁸/₄₂+⁴²/₃₆ ²⁸/₂₁+⁴²/₇₂ ⁸⁴/₂₁+⁴²/₃₆ ²⁸/₆₃+⁴²/₃₆

Add Fractions Calculator