Subtract 15/75 from 42/84
42/84 - 15/75 is 3/10.
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,
42/84 = 42 × 25/84 × 25 = 1050/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
15/75 = 15 × 28/75 × 28 = 420/2100 - Subtract the two like fractions:
1050/2100 - 420/2100 = 1050 - 420/2100 = 630/2100 - After reducing the fraction, the answer is 3/10
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