Subtract 18/60 from 8/45
8/45 - 18/60 is -11/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
8/45 = 8 × 4/45 × 4 = 32/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
18/60 = 18 × 3/60 × 3 = 54/180 - Subtract the two like fractions:
32/180 - 54/180 = 32 - 54/180 = -22/180 - After reducing the fraction, the answer is -11/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45-18/60 8/45-36/60 8/90-18/60 24/45-18/60 8/45-54/60 40/45-18/60 8/45-90/60 56/45-18/60