Add 21/60 and 20/56
21/60 + 20/56 is 99/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 60 × 14 = 840,
21/60 = 21 × 14/60 × 14 = 294/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
20/56 = 20 × 15/56 × 15 = 300/840 - Add the two like fractions:
294/840 + 300/840 = 294 + 300/840 = 594/840 - 594/840 simplified gives 99/140
- So, 21/60 + 20/56 = 99/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+20/56 21/60+40/56 63/60+20/56 21/60+60/56