Subtract 84/72 from 42/90
1st number: 42/90, 2nd number: 1 12/72
42/90 - 84/72 is -7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
42/90 = 42 × 4/90 × 4 = 168/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
84/72 = 84 × 5/72 × 5 = 420/360 - Subtract the two like fractions:
168/360 - 420/360 = 168 - 420/360 = -252/360 - After reducing the fraction, the answer is -7/10
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Related: 84/90-84/72