Answers

Add 28/40 and 56/15

1^st number: 28/40, 2^nd number: 3 11/15

28/40 + 56/15 is 133/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 15 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 40 × 3 = 120,
   28/40 = 28 × 3/40 × 3 = 84/120
3. Likewise, for the 2nd fraction, since 15 × 8 = 120,
   56/15 = 56 × 8/15 × 8 = 448/120
4. Add the two like fractions:
   84/120 + 448/120 = 84 + 448/120 = 532/120
5. 532/120 simplified gives 133/30
6. So, 28/40 + 56/15 = 133/30
   In mixed form: 413/30

MathStep (Works offline)

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

Related: ⁵⁶/₄₀+⁵⁶/₁₅ ²⁸/₈₀+⁵⁶/₁₅ ²⁸/₄₀+⁵⁶/₃₀ ⁸⁴/₄₀+⁵⁶/₁₅ ²⁸/₄₀+⁵⁶/₄₅ ²⁸/₄₀+⁵⁶/₇₅

Add Fractions Calculator