Add 70/90 and 3/7
70/90 + 3/7 is 76/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
70/90 = 70 × 7/90 × 7 = 490/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
3/7 = 3 × 90/7 × 90 = 270/630 - Add the two like fractions:
490/630 + 270/630 = 490 + 270/630 = 760/630 - 760/630 simplified gives 76/63
- So, 70/90 + 3/7 = 76/63
In mixed form: 113/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+6/7 70/90+3/14 70/90+9/7 70/90+3/21 70/90+15/7 70/90+3/35 70/90+21/7 70/90+3/49