Add 7/10 and 21/35
7/10 + 21/35 is 13/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 35 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
7/10 = 7 × 7/10 × 7 = 49/70 - Likewise, for the 2nd fraction, since 35 × 2 = 70,
21/35 = 21 × 2/35 × 2 = 42/70 - Add the two like fractions:
49/70 + 42/70 = 49 + 42/70 = 91/70 - 91/70 simplified gives 13/10
- So, 7/10 + 21/35 = 13/10
In mixed form: 13/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10+21/35 7/10+42/35 7/20+21/35 7/10+21/70 21/10+21/35 7/10+63/35 7/30+21/35 35/10+21/35 7/50+21/35 49/10+21/35 7/70+21/35