Subtract 20/25 from 7/28
7/28 - 20/25 is -11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 25 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 28 × 25 = 700,
7/28 = 7 × 25/28 × 25 = 175/700 - Likewise, for the 2nd fraction, since 25 × 28 = 700,
20/25 = 20 × 28/25 × 28 = 560/700 - Subtract the two like fractions:
175/700 - 560/700 = 175 - 560/700 = -385/700 - After reducing the fraction, the answer is -11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-20/25 7/28-40/25 7/56-20/25 7/28-20/50 21/28-20/25 7/28-60/25 7/84-20/25 7/28-20/75 35/28-20/25 49/28-20/25