Answers

Add 90/8 and 63/20

1^st number: 11 2/8, 2^nd number: 3 3/20

90/8 + 63/20 is 72/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 20 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 8 × 5 = 40,
   90/8 = 90 × 5/8 × 5 = 450/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   63/20 = 63 × 2/20 × 2 = 126/40
4. Add the two like fractions:
   450/40 + 126/40 = 450 + 126/40 = 576/40
5. 576/40 simplified gives 72/5
6. So, 90/8 + 63/20 = 72/5
   In mixed form: 142/5

MathStep (Works offline)

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

Related: ⁹⁰/₁₆+⁶³/₂₀ ⁹⁰/₈+⁶³/₄₀ ⁹⁰/₂₄+⁶³/₂₀ ⁹⁰/₈+⁶³/₆₀ ⁹⁰/₄₀+⁶³/₂₀ ⁹⁰/₅₆+⁶³/₂₀

Add Fractions Calculator