Add 25/18 and 21/63
1st number: 1 7/18, 2nd number: 21/63
25/18 + 21/63 is 31/18.
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,
25/18 = 25 × 7/18 × 7 = 175/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126 - Add the two like fractions:
175/126 + 42/126 = 175 + 42/126 = 217/126 - 217/126 simplified gives 31/18
- So, 25/18 + 21/63 = 31/18
In mixed form: 113/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/18+21/63 25/18+42/63 25/36+21/63 75/18+21/63 25/54+21/63 25/90+21/63