Add 6/20 and 21/72
6/20 + 21/72 is 71/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
6/20 = 6 × 18/20 × 18 = 108/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
108/360 + 105/360 = 108 + 105/360 = 213/360 - 213/360 simplified gives 71/120
- So, 6/20 + 21/72 = 71/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+21/72 6/20+42/72 6/40+21/72 18/20+21/72 6/20+63/72 6/60+21/72 30/20+21/72 42/20+21/72