Add 42/21 and 56/30
1st number: 2 0/21, 2nd number: 1 26/30
42/21 + 56/30 is 58/15.
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,
42/21 = 42 × 10/21 × 10 = 420/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
56/30 = 56 × 7/30 × 7 = 392/210 - Add the two like fractions:
420/210 + 392/210 = 420 + 392/210 = 812/210 - 812/210 simplified gives 58/15
- So, 42/21 + 56/30 = 58/15
In mixed form: 313/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+56/30 42/21+56/60 42/63+56/30 42/21+56/90