Add 21/63 and 7/10
21/63 + 7/10 is 31/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
7/10 = 7 × 63/10 × 63 = 441/630 - Add the two like fractions:
210/630 + 441/630 = 210 + 441/630 = 651/630 - 651/630 simplified gives 31/30
- So, 21/63 + 7/10 = 31/30
In mixed form: 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+7/10 21/63+14/10 21/63+7/20 21/63+21/10 21/63+7/30 21/63+35/10 21/63+7/50 21/63+49/10 21/63+7/70