Add 30/60 and 15/63
30/60 + 15/63 is 31/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
30/60 = 30 × 21/60 × 21 = 630/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
15/63 = 15 × 20/63 × 20 = 300/1260 - Add the two like fractions:
630/1260 + 300/1260 = 630 + 300/1260 = 930/1260 - 930/1260 simplified gives 31/42
- So, 30/60 + 15/63 = 31/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/60+30/63 90/60+15/63 30/60+45/63 30/60+75/63