Add 15/30 and 75/63
1st number: 15/30, 2nd number: 1 12/63
15/30 + 75/63 is 71/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
15/30 = 15 × 21/30 × 21 = 315/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
75/63 = 75 × 10/63 × 10 = 750/630 - Add the two like fractions:
315/630 + 750/630 = 315 + 750/630 = 1065/630 - 1065/630 simplified gives 71/42
- So, 15/30 + 75/63 = 71/42
In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60+75/63 45/30+75/63 15/90+75/63 75/30+75/63