Add 5/7 and 15/90
5/7 + 15/90 is 37/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
5/7 = 5 × 90/7 × 90 = 450/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Add the two like fractions:
450/630 + 105/630 = 450 + 105/630 = 555/630 - 555/630 simplified gives 37/42
- So, 5/7 + 15/90 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+15/90 5/7+30/90 5/14+15/90 15/7+15/90 5/7+45/90 5/21+15/90 25/7+15/90 5/7+75/90 5/35+15/90 35/7+15/90 5/49+15/90