Add 42/30 and 21/35
1st number: 1 12/30, 2nd number: 21/35
42/30 + 21/35 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
42/30 = 42 × 7/30 × 7 = 294/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Add the two like fractions:
294/210 + 126/210 = 294 + 126/210 = 420/210 - 420/210 simplified gives 2/1
- So, 42/30 + 21/35 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+21/35 42/30+42/35 42/60+21/35 42/30+21/70 42/30+63/35 42/90+21/35