Add 2/20 and 63/21
1st number: 2/20, 2nd number: 3 0/21
2/20 + 63/21 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
63/21 = 63 × 20/21 × 20 = 1260/420 - Add the two like fractions:
42/420 + 1260/420 = 42 + 1260/420 = 1302/420 - 1302/420 simplified gives 31/10
- So, 2/20 + 63/21 = 31/10
In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20+63/21 2/40+63/21 2/20+63/42 6/20+63/21 2/60+63/21 10/20+63/21 14/20+63/21