Answers

Add 84/56 and 15/90

1^st number: 1 28/56, 2^nd number: 15/90

84/56 + 15/90 is 5/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 90 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 56 × 45 = 2520,
   84/56 = 84 × 45/56 × 45 = 3780/2520
3. Likewise, for the 2nd fraction, since 90 × 28 = 2520,
   15/90 = 15 × 28/90 × 28 = 420/2520
4. Add the two like fractions:
   3780/2520 + 420/2520 = 3780 + 420/2520 = 4200/2520
5. 4200/2520 simplified gives 5/3
6. So, 84/56 + 15/90 = 5/3
   In mixed form: 12/3

MathStep (Works offline)

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

Related: ⁸⁴/₅₆+³⁰/₉₀ ⁸⁴/₅₆+⁴⁵/₉₀ ⁸⁴/₅₆+⁷⁵/₉₀

Add Fractions Calculator