Add 70/63 and 2/90
1st number: 1 7/63, 2nd number: 2/90
70/63 + 2/90 is 17/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
70/63 = 70 × 10/63 × 10 = 700/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
2/90 = 2 × 7/90 × 7 = 14/630 - Add the two like fractions:
700/630 + 14/630 = 700 + 14/630 = 714/630 - 714/630 simplified gives 17/15
- So, 70/63 + 2/90 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/63+4/90 70/63+6/90 70/63+10/90 70/63+14/90