Add 21/10 and 9/63
1st number: 2 1/10, 2nd number: 9/63
21/10 + 9/63 is 157/70.
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,
21/10 = 21 × 63/10 × 63 = 1323/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
9/63 = 9 × 10/63 × 10 = 90/630 - Add the two like fractions:
1323/630 + 90/630 = 1323 + 90/630 = 1413/630 - 1413/630 simplified gives 157/70
- So, 21/10 + 9/63 = 157/70
In mixed form: 217/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+9/63 21/10+18/63 21/20+9/63 63/10+9/63 21/10+27/63 21/30+9/63 21/10+45/63 21/50+9/63 21/70+9/63