Add 10/84 and 21/35
10/84 + 21/35 is 151/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
10/84 = 10 × 5/84 × 5 = 50/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
21/35 = 21 × 12/35 × 12 = 252/420 - Add the two like fractions:
50/420 + 252/420 = 50 + 252/420 = 302/420 - 302/420 simplified gives 151/210
- So, 10/84 + 21/35 = 151/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84+21/35 10/84+42/35 10/84+21/70 30/84+21/35 10/84+63/35 50/84+21/35 70/84+21/35