Subtract 80/90 from 3/5
3/5 - 80/90 is -13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
3/5 = 3 × 18/5 × 18 = 54/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
80/90 = 80 × 1/90 × 1 = 80/90 - Subtract the two like fractions:
54/90 - 80/90 = 54 - 80/90 = -26/90 - After reducing the fraction, the answer is -13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5-80/90 3/10-80/90 9/5-80/90 3/15-80/90 15/5-80/90 3/25-80/90 21/5-80/90 3/35-80/90