Subtract 42/15 from 72/4
1st number: 18 0/4, 2nd number: 2 12/15
72/4 - 42/15 is 76/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
72/4 = 72 × 15/4 × 15 = 1080/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
42/15 = 42 × 4/15 × 4 = 168/60 - Subtract the two like fractions:
1080/60 - 168/60 = 1080 - 168/60 = 912/60 - After reducing the fraction, the answer is 76/5
- In mixed form: 151/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4-84/15 72/8-42/15 72/4-42/30 72/12-42/15 72/4-42/45 72/20-42/15 72/4-42/75 72/28-42/15