Subtract 10/7 from 90/72
1st number: 1 18/72, 2nd number: 1 3/7
90/72 - 10/7 is -5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
10/7 = 10 × 72/7 × 72 = 720/504 - Subtract the two like fractions:
630/504 - 720/504 = 630 - 720/504 = -90/504 - After reducing the fraction, the answer is -5/28
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