Answers

Add 15/8 and 54/16

1^st number: 1 7/8, 2^nd number: 3 6/16

15/8 + 54/16 is 21/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 16 is 16
   
   Next, find the equivalent fraction of both fractional numbers with denominator 16
2. For the 1st fraction, since 8 × 2 = 16,
   15/8 = 15 × 2/8 × 2 = 30/16
3. Likewise, for the 2nd fraction, since 16 × 1 = 16,
   54/16 = 54 × 1/16 × 1 = 54/16
4. Add the two like fractions:
   30/16 + 54/16 = 30 + 54/16 = 84/16
5. 84/16 simplified gives 21/4
6. So, 15/8 + 54/16 = 21/4
   In mixed form: 51/4

MathStep (Works offline)

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

Related: ³⁰/₈+⁵⁴/₁₆ ¹⁵/₁₆+⁵⁴/₁₆ ¹⁵/₈+⁵⁴/₃₂ ⁴⁵/₈+⁵⁴/₁₆ ¹⁵/₂₄+⁵⁴/₁₆ ¹⁵/₈+⁵⁴/₄₈ ⁷⁵/₈+⁵⁴/₁₆ ¹⁵/₄₀+⁵⁴/₁₆ ¹⁵/₈+⁵⁴/₈₀ ¹⁵/₅₆+⁵⁴/₁₆

Add Fractions Calculator