Add 21/63 and 3/8
21/63 + 3/8 is 17/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 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 8 × 63 = 504,
3/8 = 3 × 63/8 × 63 = 189/504 - Add the two like fractions:
168/504 + 189/504 = 168 + 189/504 = 357/504 - 357/504 simplified gives 17/24
- So, 21/63 + 3/8 = 17/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+3/8 21/63+6/8 21/63+3/16 21/63+9/8 21/63+3/24 21/63+15/8 21/63+3/40 21/63+21/8 21/63+3/56