Add 15/7 and 90/8
1st number: 2 1/7, 2nd number: 11 2/8
15/7 + 90/8 is 375/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
15/7 = 15 × 8/7 × 8 = 120/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
90/8 = 90 × 7/8 × 7 = 630/56 - Add the two like fractions:
120/56 + 630/56 = 120 + 630/56 = 750/56 - 750/56 simplified gives 375/28
- So, 15/7 + 90/8 = 375/28
In mixed form: 1311/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7+90/8 15/14+90/8 15/7+90/16 45/7+90/8 15/21+90/8 15/7+90/24 75/7+90/8 15/35+90/8 15/7+90/40 15/49+90/8 15/7+90/56