Subtract 30/90 from 40/56
40/56 - 30/90 is 8/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 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 90 × 28 = 2520,
30/90 = 30 × 28/90 × 28 = 840/2520 - Subtract the two like fractions:
1800/2520 - 840/2520 = 1800 - 840/2520 = 960/2520 - After reducing the fraction, the answer is 8/21
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