Subtract 25/30 from 30/84
30/84 - 25/30 is -10/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
25/30 = 25 × 14/30 × 14 = 350/420 - Subtract the two like fractions:
150/420 - 350/420 = 150 - 350/420 = -200/420 - After reducing the fraction, the answer is -10/21
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