Subtract 42/16 from 90/84
1st number: 1 6/84, 2nd number: 2 10/16
90/84 - 42/16 is -87/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 84 × 4 = 336,
90/84 = 90 × 4/84 × 4 = 360/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
42/16 = 42 × 21/16 × 21 = 882/336 - Subtract the two like fractions:
360/336 - 882/336 = 360 - 882/336 = -522/336 - After reducing the fraction, the answer is -87/56
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