Add 12/56 and 21/35
12/56 + 21/35 is 57/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 35 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
12/56 = 12 × 5/56 × 5 = 60/280 - Likewise, for the 2nd fraction, since 35 × 8 = 280,
21/35 = 21 × 8/35 × 8 = 168/280 - Add the two like fractions:
60/280 + 168/280 = 60 + 168/280 = 228/280 - 228/280 simplified gives 57/70
- So, 12/56 + 21/35 = 57/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/56+21/35 12/56+42/35 12/56+21/70 36/56+21/35 12/56+63/35 60/56+21/35 84/56+21/35