Add 81/90 and 12/35
81/90 + 12/35 is 87/70.
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,
12/35 = 12 × 18/35 × 18 = 216/630 - Add the two like fractions:
567/630 + 216/630 = 567 + 216/630 = 783/630 - 783/630 simplified gives 87/70
- So, 81/90 + 12/35 = 87/70
In mixed form: 117/70
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