Subtract 84/15 from 42/20
1st number: 2 2/20, 2nd number: 5 9/15
42/20 - 84/15 is -7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
84/15 = 84 × 4/15 × 4 = 336/60 - Subtract the two like fractions:
126/60 - 336/60 = 126 - 336/60 = -210/60 - After reducing the fraction, the answer is -7/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-84/15 42/40-84/15 42/20-84/30 42/60-84/15 42/20-84/45 42/20-84/75