Add 56/21 and 42/30
1st number: 2 14/21, 2nd number: 1 12/30
56/21 + 42/30 is 61/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
56/21 = 56 × 10/21 × 10 = 560/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
42/30 = 42 × 7/30 × 7 = 294/210 - Add the two like fractions:
560/210 + 294/210 = 560 + 294/210 = 854/210 - 854/210 simplified gives 61/15
- So, 56/21 + 42/30 = 61/15
In mixed form: 41/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+84/30 56/42+42/30 56/21+42/60 56/63+42/30 56/21+42/90