Add 3/28 and 21/80
3/28 + 21/80 is 207/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
3/28 = 3 × 20/28 × 20 = 60/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Add the two like fractions:
60/560 + 147/560 = 60 + 147/560 = 207/560 - So, 3/28 + 21/80 = 207/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28+21/80 3/28+42/80 3/56+21/80 9/28+21/80 3/28+63/80 3/84+21/80 15/28+21/80 21/28+21/80