Subtract 21/6 from 90/75
1st number: 1 15/75, 2nd number: 3 3/6
90/75 - 21/6 is -23/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 6 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
90/75 = 90 × 2/75 × 2 = 180/150 - Likewise, for the 2nd fraction, since 6 × 25 = 150,
21/6 = 21 × 25/6 × 25 = 525/150 - Subtract the two like fractions:
180/150 - 525/150 = 180 - 525/150 = -345/150 - After reducing the fraction, the answer is -23/10
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