Subtract 7/54 from 4/90
4/90 - 7/54 is -23/270.
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,
4/90 = 4 × 3/90 × 3 = 12/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
7/54 = 7 × 5/54 × 5 = 35/270 - Subtract the two like fractions:
12/270 - 35/270 = 12 - 35/270 = -23/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90-7/54 4/90-14/54 12/90-7/54 4/90-21/54 20/90-7/54 4/90-35/54 28/90-7/54 4/90-49/54