Add 20/50 and 21/56
20/50 + 21/56 is 31/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 56 is 1400
Next, find the equivalent fraction of both fractional numbers with denominator 1400 - For the 1st fraction, since 50 × 28 = 1400,
20/50 = 20 × 28/50 × 28 = 560/1400 - Likewise, for the 2nd fraction, since 56 × 25 = 1400,
21/56 = 21 × 25/56 × 25 = 525/1400 - Add the two like fractions:
560/1400 + 525/1400 = 560 + 525/1400 = 1085/1400 - 1085/1400 simplified gives 31/40
- So, 20/50 + 21/56 = 31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50+21/56 20/50+42/56 60/50+21/56 20/50+63/56