Add 9/18 and 21/63
9/18 + 21/63 is 5/6.
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,
9/18 = 9 × 7/18 × 7 = 63/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126 - Add the two like fractions:
63/126 + 42/126 = 63 + 42/126 = 105/126 - 105/126 simplified gives 5/6
- So, 9/18 + 21/63 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18+42/63 9/36+21/63 27/18+21/63 9/54+21/63 45/18+21/63 9/90+21/63 63/18+21/63