Subtract 90/36 from 20/45
1st number: 20/45, 2nd number: 2 18/36
20/45 - 90/36 is -37/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
90/36 = 90 × 5/36 × 5 = 450/180 - Subtract the two like fractions:
80/180 - 450/180 = 80 - 450/180 = -370/180 - After reducing the fraction, the answer is -37/18
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