Add 21/63 and 7/56
21/63 + 7/56 is 11/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
7/56 = 7 × 9/56 × 9 = 63/504 - Add the two like fractions:
168/504 + 63/504 = 168 + 63/504 = 231/504 - 231/504 simplified gives 11/24
- So, 21/63 + 7/56 = 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+7/56 21/63+14/56 21/63+21/56 21/63+35/56 21/63+49/56