Subtract 2/20 from 25/42
25/42 - 2/20 is 52/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
25/42 = 25 × 10/42 × 10 = 250/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Subtract the two like fractions:
250/420 - 42/420 = 250 - 42/420 = 208/420 - After reducing the fraction, the answer is 52/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-2/20 25/42-4/20 25/84-2/20 25/42-2/40 75/42-2/20 25/42-6/20 25/42-2/60 25/42-10/20 25/42-14/20