Subtract 5/90 from 20/25
20/25 - 5/90 is 67/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
20/25 = 20 × 18/25 × 18 = 360/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
5/90 = 5 × 5/90 × 5 = 25/450 - Subtract the two like fractions:
360/450 - 25/450 = 360 - 25/450 = 335/450 - After reducing the fraction, the answer is 67/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-5/90 20/25-10/90 20/50-5/90 60/25-5/90 20/25-15/90 20/75-5/90 20/25-25/90 20/25-35/90