Subtract 42/15 from 30/84
1st number: 30/84, 2nd number: 2 12/15
30/84 - 42/15 is -171/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 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 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Subtract the two like fractions:
150/420 - 1176/420 = 150 - 1176/420 = -1026/420 - After reducing the fraction, the answer is -171/70
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