Subtract 10/42 from 72/9
1st number: 8 0/9, 2nd number: 10/42
72/9 - 10/42 is 163/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
72/9 = 72 × 14/9 × 14 = 1008/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Subtract the two like fractions:
1008/126 - 30/126 = 1008 - 30/126 = 978/126 - After reducing the fraction, the answer is 163/21
- In mixed form: 716/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/9-20/42 72/18-10/42 72/9-10/84 72/9-30/42 72/27-10/42 72/9-50/42 72/45-10/42 72/9-70/42 72/63-10/42