Add 21/63 and 48/56
21/63 + 48/56 is 25/21.
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,
48/56 = 48 × 9/56 × 9 = 432/504 - Add the two like fractions:
168/504 + 432/504 = 168 + 432/504 = 600/504 - 600/504 simplified gives 25/21
- So, 21/63 + 48/56 = 25/21
In mixed form: 14/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+48/56 21/63+96/56