Subtract 75/54 from 30/80
1st number: 30/80, 2nd number: 1 21/54
30/80 - 75/54 is -73/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 54 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 80 × 27 = 2160,
30/80 = 30 × 27/80 × 27 = 810/2160 - Likewise, for the 2nd fraction, since 54 × 40 = 2160,
75/54 = 75 × 40/54 × 40 = 3000/2160 - Subtract the two like fractions:
810/2160 - 3000/2160 = 810 - 3000/2160 = -2190/2160 - After reducing the fraction, the answer is -73/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80-75/54 90/80-75/54