Add 90/70 and 6/63
1st number: 1 20/70, 2nd number: 6/63
90/70 + 6/63 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
6/63 = 6 × 10/63 × 10 = 60/630 - Add the two like fractions:
810/630 + 60/630 = 810 + 60/630 = 870/630 - 870/630 simplified gives 29/21
- So, 90/70 + 6/63 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+12/63 90/70+18/63 90/70+30/63 90/70+42/63