Add 21/56 and 20/35
21/56 + 20/35 is 53/56.
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,
20/35 = 20 × 8/35 × 8 = 160/280 - Add the two like fractions:
105/280 + 160/280 = 105 + 160/280 = 265/280 - 265/280 simplified gives 53/56
- So, 21/56 + 20/35 = 53/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+20/35 21/56+40/35 21/56+20/70 63/56+20/35 21/56+60/35