Add 20/63 and 15/70
20/63 + 15/70 is 67/126.
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,
20/63 = 20 × 10/63 × 10 = 200/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Add the two like fractions:
200/630 + 135/630 = 200 + 135/630 = 335/630 - 335/630 simplified gives 67/126
- So, 20/63 + 15/70 = 67/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63+15/70 20/63+30/70 60/63+15/70 20/63+45/70 20/63+75/70