Subtract 90/72 from 30/75
1st number: 30/75, 2nd number: 1 18/72
30/75 - 90/72 is -17/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 75 × 24 = 1800,
30/75 = 30 × 24/75 × 24 = 720/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
90/72 = 90 × 25/72 × 25 = 2250/1800 - Subtract the two like fractions:
720/1800 - 2250/1800 = 720 - 2250/1800 = -1530/1800 - After reducing the fraction, the answer is -17/20
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