Subtract 15/50 from 72/20
1st number: 3 12/20, 2nd number: 15/50
72/20 - 15/50 is 33/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 50 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
72/20 = 72 × 5/20 × 5 = 360/100 - Likewise, for the 2nd fraction, since 50 × 2 = 100,
15/50 = 15 × 2/50 × 2 = 30/100 - Subtract the two like fractions:
360/100 - 30/100 = 360 - 30/100 = 330/100 - After reducing the fraction, the answer is 33/10
- In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20-30/50 72/40-15/50 72/20-45/50 72/60-15/50 72/20-75/50