Add 10/63 and 21/42
10/63 + 21/42 is 83/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
10/63 = 10 × 2/63 × 2 = 20/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
21/42 = 21 × 3/42 × 3 = 63/126 - Add the two like fractions:
20/126 + 63/126 = 20 + 63/126 = 83/126 - So, 10/63 + 21/42 = 83/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/63+21/42 10/63+21/84 30/63+21/42 10/63+63/42 50/63+21/42 70/63+21/42