Subtract 21/36 from 18/35
18/35 - 21/36 is -29/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 36 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 35 × 36 = 1260,
18/35 = 18 × 36/35 × 36 = 648/1260 - Likewise, for the 2nd fraction, since 36 × 35 = 1260,
21/36 = 21 × 35/36 × 35 = 735/1260 - Subtract the two like fractions:
648/1260 - 735/1260 = 648 - 735/1260 = -87/1260 - After reducing the fraction, the answer is -29/420
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