Subtract 20/90 from 5/8
5/8 - 20/90 is 29/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
5/8 = 5 × 45/8 × 45 = 225/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Subtract the two like fractions:
225/360 - 80/360 = 225 - 80/360 = 145/360 - After reducing the fraction, the answer is 29/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/8-20/90 5/8-40/90 5/16-20/90 15/8-20/90 5/8-60/90 5/24-20/90 25/8-20/90 5/40-20/90 35/8-20/90 5/56-20/90