Subtract 9/25 from 72/20
1st number: 3 12/20, 2nd number: 9/25
72/20 - 9/25 is 81/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 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 25 × 4 = 100,
9/25 = 9 × 4/25 × 4 = 36/100 - Subtract the two like fractions:
360/100 - 36/100 = 360 - 36/100 = 324/100 - After reducing the fraction, the answer is 81/25
- In mixed form: 36/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20-18/25 72/40-9/25 72/20-9/50 72/20-27/25 72/60-9/25 72/20-9/75 72/20-45/25 72/20-63/25