Add 21/63 and 8/10
21/63 + 8/10 is 17/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 10 × 63 = 630,
8/10 = 8 × 63/10 × 63 = 504/630 - Add the two like fractions:
210/630 + 504/630 = 210 + 504/630 = 714/630 - 714/630 simplified gives 17/15
- So, 21/63 + 8/10 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+8/10 21/63+16/10 21/63+8/20 21/63+24/10 21/63+8/30 21/63+40/10 21/63+8/50 21/63+56/10 21/63+8/70