Add 10/56 and 21/90
10/56 + 21/90 is 173/420.
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,
10/56 = 10 × 45/56 × 45 = 450/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
21/90 = 21 × 28/90 × 28 = 588/2520 - Add the two like fractions:
450/2520 + 588/2520 = 450 + 588/2520 = 1038/2520 - 1038/2520 simplified gives 173/420
- So, 10/56 + 21/90 = 173/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/56+21/90 10/56+42/90 30/56+21/90 10/56+63/90 50/56+21/90 70/56+21/90