Add 40/30 and 21/70
1st number: 1 10/30, 2nd number: 21/70
40/30 + 21/70 is 49/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
40/30 = 40 × 7/30 × 7 = 280/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Add the two like fractions:
280/210 + 63/210 = 280 + 63/210 = 343/210 - 343/210 simplified gives 49/30
- So, 40/30 + 21/70 = 49/30
In mixed form: 119/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+21/70 40/30+42/70 40/60+21/70 40/30+63/70 40/90+21/70