Add 60/70 and 21/28
60/70 + 21/28 is 45/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
60/70 = 60 × 2/70 × 2 = 120/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Add the two like fractions:
120/140 + 105/140 = 120 + 105/140 = 225/140 - 225/140 simplified gives 45/28
- So, 60/70 + 21/28 = 45/28
In mixed form: 117/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+42/28 60/70+21/56 60/70+63/28 60/70+21/84