Add 20/70 and 21/36
20/70 + 21/36 is 73/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 70 × 18 = 1260,
20/70 = 20 × 18/70 × 18 = 360/1260 - Likewise, for the 2nd fraction, since 36 × 35 = 1260,
21/36 = 21 × 35/36 × 35 = 735/1260 - Add the two like fractions:
360/1260 + 735/1260 = 360 + 735/1260 = 1095/1260 - 1095/1260 simplified gives 73/84
- So, 20/70 + 21/36 = 73/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+21/36 20/70+42/36 20/70+21/72 60/70+21/36 20/70+63/36