Add 90/7 and 18/8
1st number: 12 6/7, 2nd number: 2 2/8
90/7 + 18/8 is 423/28.
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,
90/7 = 90 × 8/7 × 8 = 720/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
18/8 = 18 × 7/8 × 7 = 126/56 - Add the two like fractions:
720/56 + 126/56 = 720 + 126/56 = 846/56 - 846/56 simplified gives 423/28
- So, 90/7 + 18/8 = 423/28
In mixed form: 153/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+36/8 90/14+18/8 90/7+18/16 90/7+54/8 90/21+18/8 90/7+18/24 90/7+90/8 90/35+18/8 90/7+18/40 90/49+18/8 90/7+18/56