Subtract 3/54 from 7/90
7/90 - 3/54 is 1/45.
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,
7/90 = 7 × 3/90 × 3 = 21/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
3/54 = 3 × 5/54 × 5 = 15/270 - Subtract the two like fractions:
21/270 - 15/270 = 21 - 15/270 = 6/270 - After reducing the fraction, the answer is 1/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90-3/54 7/90-6/54 21/90-3/54 7/90-9/54 35/90-3/54 7/90-15/54 49/90-3/54 7/90-21/54