Subtract 42/45 from 40/56
40/56 - 42/45 is -23/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
40/56 = 40 × 45/56 × 45 = 1800/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
42/45 = 42 × 56/45 × 56 = 2352/2520 - Subtract the two like fractions:
1800/2520 - 2352/2520 = 1800 - 2352/2520 = -552/2520 - After reducing the fraction, the answer is -23/105
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