Subtract 8/60 from 4/90
4/90 - 8/60 is -4/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
4/90 = 4 × 2/90 × 2 = 8/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
8/60 = 8 × 3/60 × 3 = 24/180 - Subtract the two like fractions:
8/180 - 24/180 = 8 - 24/180 = -16/180 - After reducing the fraction, the answer is -4/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-8/60 4/90-16/60 12/90-8/60 4/90-24/60 20/90-8/60 4/90-40/60 28/90-8/60 4/90-56/60