Add 81/7 and 50/90
1st number: 11 4/7, 2nd number: 50/90
81/7 + 50/90 is 764/63.
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,
81/7 = 81 × 90/7 × 90 = 7290/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
50/90 = 50 × 7/90 × 7 = 350/630 - Add the two like fractions:
7290/630 + 350/630 = 7290 + 350/630 = 7640/630 - 7640/630 simplified gives 764/63
- So, 81/7 + 50/90 = 764/63
In mixed form: 128/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/14+50/90 81/21+50/90 81/35+50/90 81/49+50/90