Add 42/7 and 81/90
1st number: 6 0/7, 2nd number: 81/90
42/7 + 81/90 is 69/10.
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,
42/7 = 42 × 90/7 × 90 = 3780/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Add the two like fractions:
3780/630 + 567/630 = 3780 + 567/630 = 4347/630 - 4347/630 simplified gives 69/10
- So, 42/7 + 81/90 = 69/10
In mixed form: 69/10
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