Subtract 45/4 from 72/10
1st number: 7 2/10, 2nd number: 11 1/4
72/10 - 45/4 is -81/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
72/10 = 72 × 2/10 × 2 = 144/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
45/4 = 45 × 5/4 × 5 = 225/20 - Subtract the two like fractions:
144/20 - 225/20 = 144 - 225/20 = -81/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10-90/4 72/20-45/4 72/10-45/8 72/30-45/4 72/10-45/12 72/50-45/4 72/10-45/20 72/70-45/4 72/10-45/28