Add 21/56 and 10/70
21/56 + 10/70 is 29/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 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 70 × 4 = 280,
10/70 = 10 × 4/70 × 4 = 40/280 - Add the two like fractions:
105/280 + 40/280 = 105 + 40/280 = 145/280 - 145/280 simplified gives 29/56
- So, 21/56 + 10/70 = 29/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+10/70 21/56+20/70 63/56+10/70 21/56+30/70 21/56+50/70