Add 7/56 and 21/90
7/56 + 21/90 is 43/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
7/56 = 7 × 45/56 × 45 = 315/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
21/90 = 21 × 28/90 × 28 = 588/2520 - Add the two like fractions:
315/2520 + 588/2520 = 315 + 588/2520 = 903/2520 - 903/2520 simplified gives 43/120
- So, 7/56 + 21/90 = 43/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/56+21/90 7/56+42/90 21/56+21/90 7/56+63/90 35/56+21/90 49/56+21/90