Subtract 84/42 from 42/15
1st number: 2 12/15, 2nd number: 2 0/42
42/15 - 84/42 is 4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
42/15 = 42 × 14/15 × 14 = 588/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Subtract the two like fractions:
588/210 - 420/210 = 588 - 420/210 = 168/210 - After reducing the fraction, the answer is 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-84/42 42/30-84/42 42/45-84/42 42/75-84/42