Subtract 42/48 from 21/35
21/35 - 42/48 is -11/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 48 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 35 × 48 = 1680,
21/35 = 21 × 48/35 × 48 = 1008/1680 - Likewise, for the 2nd fraction, since 48 × 35 = 1680,
42/48 = 42 × 35/48 × 35 = 1470/1680 - Subtract the two like fractions:
1008/1680 - 1470/1680 = 1008 - 1470/1680 = -462/1680 - After reducing the fraction, the answer is -11/40
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