Subtract 2/80 from 20/90
20/90 - 2/80 is 71/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
20/90 = 20 × 8/90 × 8 = 160/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
2/80 = 2 × 9/80 × 9 = 18/720 - Subtract the two like fractions:
160/720 - 18/720 = 160 - 18/720 = 142/720 - After reducing the fraction, the answer is 71/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-2/80 20/90-4/80 60/90-2/80 20/90-6/80 20/90-10/80 20/90-14/80