Subtract 10/40 from 3/42
3/42 - 10/40 is -5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
3/42 = 3 × 20/42 × 20 = 60/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
10/40 = 10 × 21/40 × 21 = 210/840 - Subtract the two like fractions:
60/840 - 210/840 = 60 - 210/840 = -150/840 - After reducing the fraction, the answer is -5/28
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