Add 21/40 and 60/28
1st number: 21/40, 2nd number: 2 4/28
21/40 + 60/28 is 747/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
60/28 = 60 × 10/28 × 10 = 600/280 - Add the two like fractions:
147/280 + 600/280 = 147 + 600/280 = 747/280 - So, 21/40 + 60/28 = 747/280
In mixed form: 2187/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40+60/28 21/80+60/28 21/40+60/56 63/40+60/28 21/40+60/84