Subtract 70/75 from 7/84
7/84 - 70/75 is -17/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
7/84 = 7 × 25/84 × 25 = 175/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
70/75 = 70 × 28/75 × 28 = 1960/2100 - Subtract the two like fractions:
175/2100 - 1960/2100 = 175 - 1960/2100 = -1785/2100 - After reducing the fraction, the answer is -17/20
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