Subtract 18/16 from 9/15
1st number: 9/15, 2nd number: 1 2/16
9/15 - 18/16 is -21/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
9/15 = 9 × 16/15 × 16 = 144/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
18/16 = 18 × 15/16 × 15 = 270/240 - Subtract the two like fractions:
144/240 - 270/240 = 144 - 270/240 = -126/240 - After reducing the fraction, the answer is -21/40
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