Subtract 16/54 from 18/90
18/90 - 16/54 is -13/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 90 × 3 = 270,
18/90 = 18 × 3/90 × 3 = 54/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
16/54 = 16 × 5/54 × 5 = 80/270 - Subtract the two like fractions:
54/270 - 80/270 = 54 - 80/270 = -26/270 - After reducing the fraction, the answer is -13/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90-16/54 18/90-32/54 54/90-16/54 18/90-48/54 18/90-80/54