Subtract 20/42 from 25/75
25/75 - 20/42 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 75 × 14 = 1050,
25/75 = 25 × 14/75 × 14 = 350/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
20/42 = 20 × 25/42 × 25 = 500/1050 - Subtract the two like fractions:
350/1050 - 500/1050 = 350 - 500/1050 = -150/1050 - After reducing the fraction, the answer is -1/7
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