Add 56/40 and 21/70
1st number: 1 16/40, 2nd number: 21/70
56/40 + 21/70 is 17/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
56/40 = 56 × 7/40 × 7 = 392/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
21/70 = 21 × 4/70 × 4 = 84/280 - Add the two like fractions:
392/280 + 84/280 = 392 + 84/280 = 476/280 - 476/280 simplified gives 17/10
- So, 56/40 + 21/70 = 17/10
In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+42/70 56/80+21/70 56/40+63/70