Add 81/60 and 21/10
1st number: 1 21/60, 2nd number: 2 1/10
81/60 + 21/10 is 69/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 10 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Likewise, for the 2nd fraction, since 10 × 6 = 60,
21/10 = 21 × 6/10 × 6 = 126/60 - Add the two like fractions:
81/60 + 126/60 = 81 + 126/60 = 207/60 - 207/60 simplified gives 69/20
- So, 81/60 + 21/10 = 69/20
In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/60+42/10 81/60+21/20 81/60+63/10 81/60+21/30 81/60+21/50 81/60+21/70