Answers

Add 15/56 and 45/40

1^st number: 15/56, 2^nd number: 1 5/40

15/56 + 45/40 is 39/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 56 × 5 = 280,
   15/56 = 15 × 5/56 × 5 = 75/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   45/40 = 45 × 7/40 × 7 = 315/280
4. Add the two like fractions:
   75/280 + 315/280 = 75 + 315/280 = 390/280
5. 390/280 simplified gives 39/28
6. So, 15/56 + 45/40 = 39/28
   In mixed form: 111/28

MathStep (Works offline)

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

Related: ³⁰/₅₆+⁴⁵/₄₀ ¹⁵/₅₆+⁹⁰/₄₀ ¹⁵/₅₆+⁴⁵/₈₀ ⁴⁵/₅₆+⁴⁵/₄₀ ⁷⁵/₅₆+⁴⁵/₄₀

Add Fractions Calculator