Subtract 84/90 from 9/40
9/40 - 84/90 is -17/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
9/40 = 9 × 9/40 × 9 = 81/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
84/90 = 84 × 4/90 × 4 = 336/360 - Subtract the two like fractions:
81/360 - 336/360 = 81 - 336/360 = -255/360 - After reducing the fraction, the answer is -17/24
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