Add 10/63 and 21/90
10/63 + 21/90 is 247/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
10/63 = 10 × 10/63 × 10 = 100/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Add the two like fractions:
100/630 + 147/630 = 100 + 147/630 = 247/630 - So, 10/63 + 21/90 = 247/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/63+21/90 10/63+42/90 30/63+21/90 10/63+63/90 50/63+21/90 70/63+21/90