Add 30/15 and 72/63
1st number: 2 0/15, 2nd number: 1 9/63
30/15 + 72/63 is 22/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
30/15 = 30 × 21/15 × 21 = 630/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
72/63 = 72 × 5/63 × 5 = 360/315 - Add the two like fractions:
630/315 + 360/315 = 630 + 360/315 = 990/315 - 990/315 simplified gives 22/7
- So, 30/15 + 72/63 = 22/7
In mixed form: 31/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15+72/63 90/15+72/63 30/45+72/63 30/75+72/63