Add 3/60 and 63/21
1st number: 3/60, 2nd number: 3 0/21
3/60 + 63/21 is 61/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
3/60 = 3 × 7/60 × 7 = 21/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
63/21 = 63 × 20/21 × 20 = 1260/420 - Add the two like fractions:
21/420 + 1260/420 = 21 + 1260/420 = 1281/420 - 1281/420 simplified gives 61/20
- So, 3/60 + 63/21 = 61/20
In mixed form: 31/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/60+63/21 3/60+63/42 9/60+63/21 15/60+63/21 21/60+63/21