Add 70/14 and 21/40
1st number: 5 0/14, 2nd number: 21/40
70/14 + 21/40 is 221/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
70/14 = 70 × 20/14 × 20 = 1400/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Add the two like fractions:
1400/280 + 147/280 = 1400 + 147/280 = 1547/280 - 1547/280 simplified gives 221/40
- So, 70/14 + 21/40 = 221/40
In mixed form: 521/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/14+42/40 70/28+21/40 70/14+21/80 70/14+63/40 70/42+21/40 70/98+21/40