Add 72/35 and 21/80
1st number: 2 2/35, 2nd number: 21/80
72/35 + 21/80 is 1299/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 35 × 16 = 560,
72/35 = 72 × 16/35 × 16 = 1152/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Add the two like fractions:
1152/560 + 147/560 = 1152 + 147/560 = 1299/560 - So, 72/35 + 21/80 = 1299/560
In mixed form: 2179/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/35+42/80 72/70+21/80 72/35+63/80