Subtract 18/40 from 45/25
1st number: 1 20/25, 2nd number: 18/40
45/25 - 18/40 is 27/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
45/25 = 45 × 8/25 × 8 = 360/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
18/40 = 18 × 5/40 × 5 = 90/200 - Subtract the two like fractions:
360/200 - 90/200 = 360 - 90/200 = 270/200 - After reducing the fraction, the answer is 27/20
- In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25-18/40 45/25-36/40 45/50-18/40 45/25-18/80 45/25-54/40 45/75-18/40 45/25-90/40