Subtract 9/32 from 20/90
20/90 - 9/32 is -17/288.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 32 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 90 × 16 = 1440,
20/90 = 20 × 16/90 × 16 = 320/1440 - Likewise, for the 2nd fraction, since 32 × 45 = 1440,
9/32 = 9 × 45/32 × 45 = 405/1440 - Subtract the two like fractions:
320/1440 - 405/1440 = 320 - 405/1440 = -85/1440 - After reducing the fraction, the answer is -17/288
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