Subtract 30/54 from 30/90
30/90 - 30/54 is -2/9.
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,
30/90 = 30 × 3/90 × 3 = 90/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
30/54 = 30 × 5/54 × 5 = 150/270 - Subtract the two like fractions:
90/270 - 150/270 = 90 - 150/270 = -60/270 - After reducing the fraction, the answer is -2/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90-30/54 30/90-60/54 30/90-90/54