Add 35/70 and 21/56
35/70 + 21/56 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
35/70 = 35 × 4/70 × 4 = 140/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Add the two like fractions:
140/280 + 105/280 = 140 + 105/280 = 245/280 - 245/280 simplified gives 7/8
- So, 35/70 + 21/56 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 35/70+42/56 35/70+63/56