Subtract 90/84 from 42/15
1st number: 2 12/15, 2nd number: 1 6/84
42/15 - 90/84 is 121/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Subtract the two like fractions:
1176/420 - 450/420 = 1176 - 450/420 = 726/420 - After reducing the fraction, the answer is 121/70
- In mixed form: 151/70
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