Subtract 72/7 from 45/2
1st number: 22 1/2, 2nd number: 10 2/7
45/2 - 72/7 is 171/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
45/2 = 45 × 7/2 × 7 = 315/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
72/7 = 72 × 2/7 × 2 = 144/14 - Subtract the two like fractions:
315/14 - 144/14 = 315 - 144/14 = 171/14 - In mixed form: 123/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-72/7 45/4-72/7 45/2-72/14 45/6-72/7 45/2-72/21 45/10-72/7 45/2-72/35 45/14-72/7 45/2-72/49