Add 18/10 and 21/63
1st number: 1 8/10, 2nd number: 21/63
18/10 + 21/63 is 32/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 10 × 63 = 630,
18/10 = 18 × 63/10 × 63 = 1134/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Add the two like fractions:
1134/630 + 210/630 = 1134 + 210/630 = 1344/630 - 1344/630 simplified gives 32/15
- So, 18/10 + 21/63 = 32/15
In mixed form: 22/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10+21/63 18/10+42/63 18/20+21/63 54/10+21/63 18/30+21/63 90/10+21/63 18/50+21/63 18/70+21/63