Subtract 24/7 from 72/42
1st number: 1 30/42, 2nd number: 3 3/7
72/42 - 24/7 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
72/42 = 72 × 1/42 × 1 = 72/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
24/7 = 24 × 6/7 × 6 = 144/42 - Subtract the two like fractions:
72/42 - 144/42 = 72 - 144/42 = -72/42 - After reducing the fraction, the answer is -12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42-48/7 72/84-24/7 72/42-24/14 72/42-72/7 72/42-24/21 72/42-24/35 72/42-24/49