Add 21/56 and 36/80
21/56 + 36/80 is 33/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 56 × 10 = 560,
21/56 = 21 × 10/56 × 10 = 210/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
36/80 = 36 × 7/80 × 7 = 252/560 - Add the two like fractions:
210/560 + 252/560 = 210 + 252/560 = 462/560 - 462/560 simplified gives 33/40
- So, 21/56 + 36/80 = 33/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+36/80 21/56+72/80 63/56+36/80