Subtract 21/28 from 4/25
4/25 - 21/28 is -59/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 28 is 700
Next, find the equivalent fraction of both fractional numbers with denominator 700 - For the 1st fraction, since 25 × 28 = 700,
4/25 = 4 × 28/25 × 28 = 112/700 - Likewise, for the 2nd fraction, since 28 × 25 = 700,
21/28 = 21 × 25/28 × 25 = 525/700 - Subtract the two like fractions:
112/700 - 525/700 = 112 - 525/700 = -413/700 - After reducing the fraction, the answer is -59/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/25-21/28 4/25-42/28 4/50-21/28 4/25-21/56 12/25-21/28 4/25-63/28 4/75-21/28 4/25-21/84 20/25-21/28 28/25-21/28