Subtract 21/12 from 20/75
1st number: 20/75, 2nd number: 1 9/12
20/75 - 21/12 is -89/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 12 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 75 × 4 = 300,
20/75 = 20 × 4/75 × 4 = 80/300 - Likewise, for the 2nd fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Subtract the two like fractions:
80/300 - 525/300 = 80 - 525/300 = -445/300 - After reducing the fraction, the answer is -89/60
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