Add 81/90 and 42/35
1st number: 81/90, 2nd number: 1 7/35
81/90 + 42/35 is 21/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 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 35 × 18 = 630,
42/35 = 42 × 18/35 × 18 = 756/630 - Add the two like fractions:
567/630 + 756/630 = 567 + 756/630 = 1323/630 - 1323/630 simplified gives 21/10
- So, 81/90 + 42/35 = 21/10
In mixed form: 21/10
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