Subtract 28/18 from 10/40
1st number: 10/40, 2nd number: 1 10/18
10/40 - 28/18 is -47/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
28/18 = 28 × 20/18 × 20 = 560/360 - Subtract the two like fractions:
90/360 - 560/360 = 90 - 560/360 = -470/360 - After reducing the fraction, the answer is -47/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-28/18 10/40-56/18 10/80-28/18 10/40-28/36 30/40-28/18 10/40-84/18 10/40-28/54 50/40-28/18 10/40-28/90 70/40-28/18