Subtract 18/40 from 3/25
3/25 - 18/40 is -33/100.
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,
3/25 = 3 × 8/25 × 8 = 24/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
18/40 = 18 × 5/40 × 5 = 90/200 - Subtract the two like fractions:
24/200 - 90/200 = 24 - 90/200 = -66/200 - After reducing the fraction, the answer is -33/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/25-18/40 3/25-36/40 3/50-18/40 3/25-18/80 9/25-18/40 3/25-54/40 3/75-18/40 15/25-18/40 3/25-90/40 21/25-18/40