Add 81/90 and 30/35
81/90 + 30/35 is 123/70.
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,
30/35 = 30 × 18/35 × 18 = 540/630 - Add the two like fractions:
567/630 + 540/630 = 567 + 540/630 = 1107/630 - 1107/630 simplified gives 123/70
- So, 81/90 + 30/35 = 123/70
In mixed form: 153/70
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