Subtract 28/42 from 20/25
20/25 - 28/42 is 2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
20/25 = 20 × 42/25 × 42 = 840/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
28/42 = 28 × 25/42 × 25 = 700/1050 - Subtract the two like fractions:
840/1050 - 700/1050 = 840 - 700/1050 = 140/1050 - After reducing the fraction, the answer is 2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-28/42 20/25-56/42 20/50-28/42 20/25-28/84 60/25-28/42 20/25-84/42 20/75-28/42