Add 10/18 and 21/63
10/18 + 21/63 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126 - Add the two like fractions:
70/126 + 42/126 = 70 + 42/126 = 112/126 - 112/126 simplified gives 8/9
- So, 10/18 + 21/63 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+21/63 10/18+42/63 10/36+21/63 30/18+21/63 10/54+21/63 50/18+21/63 10/90+21/63 70/18+21/63