Answers

Add 90/8 and 21/60

1^st number: 11 2/8, 2^nd number: 21/60

90/8 + 21/60 is 58/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 60 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 8 × 15 = 120,
   90/8 = 90 × 15/8 × 15 = 1350/120
3. Likewise, for the 2nd fraction, since 60 × 2 = 120,
   21/60 = 21 × 2/60 × 2 = 42/120
4. Add the two like fractions:
   1350/120 + 42/120 = 1350 + 42/120 = 1392/120
5. 1392/120 simplified gives 58/5
6. So, 90/8 + 21/60 = 58/5
   In mixed form: 113/5

MathStep (Works offline)

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

Related: ⁹⁰/₈+⁴²/₆₀ ⁹⁰/₁₆+²¹/₆₀ ⁹⁰/₈+⁶³/₆₀ ⁹⁰/₂₄+²¹/₆₀ ⁹⁰/₄₀+²¹/₆₀ ⁹⁰/₅₆+²¹/₆₀

Add Fractions Calculator