Subtract 21/25 from 70/84
70/84 - 21/25 is -1/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
70/84 = 70 × 25/84 × 25 = 1750/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
21/25 = 21 × 84/25 × 84 = 1764/2100 - Subtract the two like fractions:
1750/2100 - 1764/2100 = 1750 - 1764/2100 = -14/2100 - After reducing the fraction, the answer is -1/150
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