Subtract 90/75 from 18/28
1st number: 18/28, 2nd number: 1 15/75
18/28 - 90/75 is -39/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 28 × 75 = 2100,
18/28 = 18 × 75/28 × 75 = 1350/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
90/75 = 90 × 28/75 × 28 = 2520/2100 - Subtract the two like fractions:
1350/2100 - 2520/2100 = 1350 - 2520/2100 = -1170/2100 - After reducing the fraction, the answer is -39/70
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