Subtract 40/28 from 15/40
1st number: 15/40, 2nd number: 1 12/28
15/40 - 40/28 is -59/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
40/28 = 40 × 10/28 × 10 = 400/280 - Subtract the two like fractions:
105/280 - 400/280 = 105 - 400/280 = -295/280 - After reducing the fraction, the answer is -59/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-40/28 15/40-80/28 15/80-40/28 15/40-40/56 45/40-40/28 15/40-40/84 75/40-40/28