Subtract 20/90 from 3/24
3/24 - 20/90 is -7/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
3/24 = 3 × 15/24 × 15 = 45/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
20/90 = 20 × 4/90 × 4 = 80/360 - Subtract the two like fractions:
45/360 - 80/360 = 45 - 80/360 = -35/360 - After reducing the fraction, the answer is -7/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/24-20/90 3/24-40/90 3/48-20/90 9/24-20/90 3/24-60/90 3/72-20/90 15/24-20/90 21/24-20/90