Subtract 90/72 from 36/84
1st number: 36/84, 2nd number: 1 18/72
36/84 - 90/72 is -23/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
36/84 = 36 × 6/84 × 6 = 216/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Subtract the two like fractions:
216/504 - 630/504 = 216 - 630/504 = -414/504 - After reducing the fraction, the answer is -23/28
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Related: 72/84-90/72