Subtract 21/90 from 9/35
9/35 - 21/90 is 1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
9/35 = 9 × 18/35 × 18 = 162/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Subtract the two like fractions:
162/630 - 147/630 = 162 - 147/630 = 15/630 - After reducing the fraction, the answer is 1/42
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