Subtract 10/40 from 8/28
8/28 - 10/40 is 1/28.
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,
8/28 = 8 × 10/28 × 10 = 80/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Subtract the two like fractions:
80/280 - 70/280 = 80 - 70/280 = 10/280 - After reducing the fraction, the answer is 1/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28-10/40 8/28-20/40 8/56-10/40 8/28-10/80 24/28-10/40 8/28-30/40 8/84-10/40 40/28-10/40 8/28-50/40 56/28-10/40 8/28-70/40