Add 21/56 and 7/35
21/56 + 7/35 is 23/40.
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,
21/56 = 21 × 5/56 × 5 = 105/280 - Likewise, for the 2nd fraction, since 35 × 8 = 280,
7/35 = 7 × 8/35 × 8 = 56/280 - Add the two like fractions:
105/280 + 56/280 = 105 + 56/280 = 161/280 - 161/280 simplified gives 23/40
- So, 21/56 + 7/35 = 23/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+7/35 21/56+14/35 21/56+7/70 63/56+7/35 21/56+21/35 21/56+49/35