Subtract 40/56 from 7/90
7/90 - 40/56 is -401/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
7/90 = 7 × 28/90 × 28 = 196/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
40/56 = 40 × 45/56 × 45 = 1800/2520 - Subtract the two like fractions:
196/2520 - 1800/2520 = 196 - 1800/2520 = -1604/2520 - After reducing the fraction, the answer is -401/630
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