Subtract 90/45 from 18/15
1st number: 1 3/15, 2nd number: 2 0/45
18/15 - 90/45 is -4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
18/15 = 18 × 3/15 × 3 = 54/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
90/45 = 90 × 1/45 × 1 = 90/45 - Subtract the two like fractions:
54/45 - 90/45 = 54 - 90/45 = -36/45 - After reducing the fraction, the answer is -4/5
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