Subtract 54/84 from 3/90
3/90 - 54/84 is -64/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
3/90 = 3 × 14/90 × 14 = 42/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
54/84 = 54 × 15/84 × 15 = 810/1260 - Subtract the two like fractions:
42/1260 - 810/1260 = 42 - 810/1260 = -768/1260 - After reducing the fraction, the answer is -64/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90-54/84 9/90-54/84 15/90-54/84 21/90-54/84