Subtract 4/25 from 20/42
20/42 - 4/25 is 166/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 25 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
20/42 = 20 × 25/42 × 25 = 500/1050 - Likewise, for the 2nd fraction, since 25 × 42 = 1050,
4/25 = 4 × 42/25 × 42 = 168/1050 - Subtract the two like fractions:
500/1050 - 168/1050 = 500 - 168/1050 = 332/1050 - After reducing the fraction, the answer is 166/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-4/25 20/42-8/25 20/84-4/25 20/42-4/50 60/42-4/25 20/42-12/25 20/42-4/75 20/42-20/25 20/42-28/25