Add 45/28 and 21/60
1st number: 1 17/28, 2nd number: 21/60
45/28 + 21/60 is 137/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
45/28 = 45 × 15/28 × 15 = 675/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Add the two like fractions:
675/420 + 147/420 = 675 + 147/420 = 822/420 - 822/420 simplified gives 137/70
- So, 45/28 + 21/60 = 137/70
In mixed form: 167/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+21/60 45/28+42/60 45/56+21/60 45/28+63/60 45/84+21/60