Subtract 21/20 from 18/75
1st number: 18/75, 2nd number: 1 1/20
18/75 - 21/20 is -81/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 20 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
18/75 = 18 × 4/75 × 4 = 72/300 - Likewise, for the 2nd fraction, since 20 × 15 = 300,
21/20 = 21 × 15/20 × 15 = 315/300 - Subtract the two like fractions:
72/300 - 315/300 = 72 - 315/300 = -243/300 - After reducing the fraction, the answer is -81/100
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