Subtract 25/42 from 10/40
10/40 - 25/42 is -29/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
10/40 = 10 × 21/40 × 21 = 210/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
25/42 = 25 × 20/42 × 20 = 500/840 - Subtract the two like fractions:
210/840 - 500/840 = 210 - 500/840 = -290/840 - After reducing the fraction, the answer is -29/84
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