Subtract 18/40 from 15/28
15/28 - 18/40 is 3/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
15/28 = 15 × 10/28 × 10 = 150/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Subtract the two like fractions:
150/280 - 126/280 = 150 - 126/280 = 24/280 - After reducing the fraction, the answer is 3/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-18/40 15/28-36/40 15/56-18/40 15/28-18/80 45/28-18/40 15/28-54/40 15/84-18/40 75/28-18/40 15/28-90/40