Subtract 15/16 from 18/25
18/25 - 15/16 is -87/400.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 16 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 25 × 16 = 400,
18/25 = 18 × 16/25 × 16 = 288/400 - Likewise, for the 2nd fraction, since 16 × 25 = 400,
15/16 = 15 × 25/16 × 25 = 375/400 - Subtract the two like fractions:
288/400 - 375/400 = 288 - 375/400 = -87/400
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25-15/16 18/25-30/16 18/50-15/16 18/25-15/32 54/25-15/16 18/25-45/16 18/75-15/16 18/25-15/48 90/25-15/16 18/25-75/16 18/25-15/80