Answers

Add 21/15 and 50/90

1^st number: 1 6/15, 2^nd number: 50/90

21/15 + 50/90 is 88/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 15 × 6 = 90,
   21/15 = 21 × 6/15 × 6 = 126/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   50/90 = 50 × 1/90 × 1 = 50/90
4. Add the two like fractions:
   126/90 + 50/90 = 126 + 50/90 = 176/90
5. 176/90 simplified gives 88/45
6. So, 21/15 + 50/90 = 88/45
   In mixed form: 143/45

MathStep (Works offline)

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

Related: ⁴²/₁₅+⁵⁰/₉₀ ²¹/₃₀+⁵⁰/₉₀ ⁶³/₁₅+⁵⁰/₉₀ ²¹/₄₅+⁵⁰/₉₀ ²¹/₇₅+⁵⁰/₉₀

Add Fractions Calculator