Subtract 49/90 from 15/54
15/54 - 49/90 is -4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 90 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
15/54 = 15 × 5/54 × 5 = 75/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
49/90 = 49 × 3/90 × 3 = 147/270 - Subtract the two like fractions:
75/270 - 147/270 = 75 - 147/270 = -72/270 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/54-49/90 15/54-98/90 45/54-49/90 75/54-49/90