Add 15/63 and 50/70
15/63 + 50/70 is 20/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
50/70 = 50 × 9/70 × 9 = 450/630 - Add the two like fractions:
150/630 + 450/630 = 150 + 450/630 = 600/630 - 600/630 simplified gives 20/21
- So, 15/63 + 50/70 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63+50/70 45/63+50/70 75/63+50/70