Subtract 42/80 from 90/84
1st number: 1 6/84, 2nd number: 42/80
90/84 - 42/80 is 153/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
90/84 = 90 × 20/84 × 20 = 1800/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Subtract the two like fractions:
1800/1680 - 882/1680 = 1800 - 882/1680 = 918/1680 - After reducing the fraction, the answer is 153/280
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Related: 90/84-84/80