Subtract 21/9 from 8/40
1st number: 8/40, 2nd number: 2 3/9
8/40 - 21/9 is -32/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
8/40 = 8 × 9/40 × 9 = 72/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
21/9 = 21 × 40/9 × 40 = 840/360 - Subtract the two like fractions:
72/360 - 840/360 = 72 - 840/360 = -768/360 - After reducing the fraction, the answer is -32/15
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