Subtract 90/96 from 18/20
18/20 - 90/96 is -3/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 96 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 20 × 24 = 480,
18/20 = 18 × 24/20 × 24 = 432/480 - Likewise, for the 2nd fraction, since 96 × 5 = 480,
90/96 = 90 × 5/96 × 5 = 450/480 - Subtract the two like fractions:
432/480 - 450/480 = 432 - 450/480 = -18/480 - After reducing the fraction, the answer is -3/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-90/96 18/40-90/96 54/20-90/96 18/60-90/96 90/20-90/96