Subtract 12/36 from 9/90
9/90 - 12/36 is -7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
9/90 = 9 × 2/90 × 2 = 18/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
12/36 = 12 × 5/36 × 5 = 60/180 - Subtract the two like fractions:
18/180 - 60/180 = 18 - 60/180 = -42/180 - After reducing the fraction, the answer is -7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/90-12/36 9/90-24/36 9/90-12/72 27/90-12/36 45/90-12/36 9/90-60/36 63/90-12/36 9/90-84/36