Subtract 45/84 from 10/40
10/40 - 45/84 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 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 84 × 10 = 840,
45/84 = 45 × 10/84 × 10 = 450/840 - Subtract the two like fractions:
210/840 - 450/840 = 210 - 450/840 = -240/840 - After reducing the fraction, the answer is -2/7
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