Subtract 48/80 from 9/90
9/90 - 48/80 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
9/90 = 9 × 8/90 × 8 = 72/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
48/80 = 48 × 9/80 × 9 = 432/720 - Subtract the two like fractions:
72/720 - 432/720 = 72 - 432/720 = -360/720 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-48/80 9/90-96/80 27/90-48/80 45/90-48/80 63/90-48/80