Add 72/10 and 21/35
1st number: 7 2/10, 2nd number: 21/35
72/10 + 21/35 is 39/5.
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,
72/10 = 72 × 7/10 × 7 = 504/70 - Likewise, for the 2nd fraction, since 35 × 2 = 70,
21/35 = 21 × 2/35 × 2 = 42/70 - Add the two like fractions:
504/70 + 42/70 = 504 + 42/70 = 546/70 - 546/70 simplified gives 39/5
- So, 72/10 + 21/35 = 39/5
In mixed form: 74/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10+42/35 72/20+21/35 72/10+21/70 72/10+63/35 72/30+21/35 72/50+21/35 72/70+21/35