Answers

Add 28/15 and 56/80

1^st number: 1 13/15, 2^nd number: 56/80

28/15 + 56/80 is 77/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   28/15 = 28 × 16/15 × 16 = 448/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   56/80 = 56 × 3/80 × 3 = 168/240
4. Add the two like fractions:
   448/240 + 168/240 = 448 + 168/240 = 616/240
5. 616/240 simplified gives 77/30
6. So, 28/15 + 56/80 = 77/30
   In mixed form: 217/30

MathStep (Works offline)

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

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

Add Fractions Calculator