Add 21/15 and 1/60
1st number: 1 6/15, 2nd number: 1/60
21/15 + 1/60 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
21/15 = 21 × 4/15 × 4 = 84/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
1/60 = 1 × 1/60 × 1 = 1/60 - Add the two like fractions:
84/60 + 1/60 = 84 + 1/60 = 85/60 - 85/60 simplified gives 17/12
- So, 21/15 + 1/60 = 17/12
In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+1/60 21/15+2/60 21/30+1/60 63/15+1/60 21/15+3/60 21/45+1/60 21/15+5/60 21/75+1/60 21/15+7/60