Subtract 90/80 from 15/27
1st number: 15/27, 2nd number: 1 10/80
15/27 - 90/80 is -41/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 27 × 80 = 2160,
15/27 = 15 × 80/27 × 80 = 1200/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
90/80 = 90 × 27/80 × 27 = 2430/2160 - Subtract the two like fractions:
1200/2160 - 2430/2160 = 1200 - 2430/2160 = -1230/2160 - After reducing the fraction, the answer is -41/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/27-90/80 15/54-90/80 45/27-90/80 15/81-90/80 75/27-90/80