Subtract 84/80 from 15/42
1st number: 15/42, 2nd number: 1 4/80
15/42 - 84/80 is -97/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
15/42 = 15 × 40/42 × 40 = 600/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680 - Subtract the two like fractions:
600/1680 - 1764/1680 = 600 - 1764/1680 = -1164/1680 - After reducing the fraction, the answer is -97/140
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