Subtract 90/25 from 8/20
1st number: 8/20, 2nd number: 3 15/25
8/20 - 90/25 is -16/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
8/20 = 8 × 5/20 × 5 = 40/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
90/25 = 90 × 4/25 × 4 = 360/100 - Subtract the two like fractions:
40/100 - 360/100 = 40 - 360/100 = -320/100 - After reducing the fraction, the answer is -16/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-90/25 8/40-90/25 8/20-90/50 24/20-90/25 8/60-90/25 8/20-90/75 40/20-90/25 56/20-90/25