Subtract 20/80 from 1/25
1/25 - 20/80 is -21/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 25 × 16 = 400,
1/25 = 1 × 16/25 × 16 = 16/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
20/80 = 20 × 5/80 × 5 = 100/400 - Subtract the two like fractions:
16/400 - 100/400 = 16 - 100/400 = -84/400 - After reducing the fraction, the answer is -21/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/25-20/80 1/25-40/80 1/50-20/80 3/25-20/80 1/25-60/80 1/75-20/80 5/25-20/80 7/25-20/80