Subtract 72/16 from 90/28
1st number: 3 6/28, 2nd number: 4 8/16
90/28 - 72/16 is -9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 28 × 4 = 112,
90/28 = 90 × 4/28 × 4 = 360/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
72/16 = 72 × 7/16 × 7 = 504/112 - Subtract the two like fractions:
360/112 - 504/112 = 360 - 504/112 = -144/112 - After reducing the fraction, the answer is -9/7
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