Add 9/70 and 81/90
9/70 + 81/90 is 36/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
9/70 = 9 × 9/70 × 9 = 81/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Add the two like fractions:
81/630 + 567/630 = 81 + 567/630 = 648/630 - 648/630 simplified gives 36/35
- So, 9/70 + 81/90 = 36/35
In mixed form: 11/35
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