Add 7/63 and 21/70
7/63 + 21/70 is 37/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
7/63 = 7 × 10/63 × 10 = 70/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Add the two like fractions:
70/630 + 189/630 = 70 + 189/630 = 259/630 - 259/630 simplified gives 37/90
- So, 7/63 + 21/70 = 37/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63+21/70 7/63+42/70 21/63+21/70 7/63+63/70 35/63+21/70 49/63+21/70