Subtract 1/30 from 42/84
42/84 - 1/30 is 7/15.
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,
42/84 = 42 × 5/84 × 5 = 210/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
1/30 = 1 × 14/30 × 14 = 14/420 - Subtract the two like fractions:
210/420 - 14/420 = 210 - 14/420 = 196/420 - After reducing the fraction, the answer is 7/15
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