Add 70/40 and 21/32
1st number: 1 30/40, 2nd number: 21/32
70/40 + 21/32 is 77/32.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 40 × 4 = 160,
70/40 = 70 × 4/40 × 4 = 280/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
21/32 = 21 × 5/32 × 5 = 105/160 - Add the two like fractions:
280/160 + 105/160 = 280 + 105/160 = 385/160 - 385/160 simplified gives 77/32
- So, 70/40 + 21/32 = 77/32
In mixed form: 213/32
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+42/32 70/80+21/32 70/40+21/64 70/40+63/32 70/40+21/96