Add 5/7 and 81/90
5/7 + 81/90 is 113/70.
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,
81/90 = 81 × 7/90 × 7 = 567/630 - Add the two like fractions:
450/630 + 567/630 = 450 + 567/630 = 1017/630 - 1017/630 simplified gives 113/70
- So, 5/7 + 81/90 = 113/70
In mixed form: 143/70
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