Add 81/90 and 40/7
1st number: 81/90, 2nd number: 5 5/7
81/90 + 40/7 is 463/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
40/7 = 40 × 90/7 × 90 = 3600/630 - Add the two like fractions:
567/630 + 3600/630 = 567 + 3600/630 = 4167/630 - 4167/630 simplified gives 463/70
- So, 81/90 + 40/7 = 463/70
In mixed form: 643/70
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