Subtract 24/40 from 9/90
9/90 - 24/40 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
9/90 = 9 × 4/90 × 4 = 36/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
24/40 = 24 × 9/40 × 9 = 216/360 - Subtract the two like fractions:
36/360 - 216/360 = 36 - 216/360 = -180/360 - 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: 18/90-24/40 9/90-48/40 9/90-24/80 27/90-24/40 9/90-72/40 45/90-24/40 63/90-24/40