Answers

Add 63/72 and 80/20

1^st number: 63/72, 2^nd number: 4 0/20

63/72 + 80/20 is 39/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 20 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   63/72 = 63 × 5/72 × 5 = 315/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   80/20 = 80 × 18/20 × 18 = 1440/360
4. Add the two like fractions:
   315/360 + 1440/360 = 315 + 1440/360 = 1755/360
5. 1755/360 simplified gives 39/8
6. So, 63/72 + 80/20 = 39/8
   In mixed form: 47/8

MathStep (Works offline)

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

Related: ⁶³/₇₂+⁸⁰/₄₀ ⁶³/₇₂+⁸⁰/₆₀

Add Fractions Calculator