Subtract 45/10 from 90/80
1st number: 1 10/80, 2nd number: 4 5/10
90/80 - 45/10 is -27/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
45/10 = 45 × 8/10 × 8 = 360/80 - Subtract the two like fractions:
90/80 - 360/80 = 90 - 360/80 = -270/80 - After reducing the fraction, the answer is -27/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-90/10 90/80-45/20 90/80-45/30 90/80-45/50 90/80-45/70