Subtract 9/50 from 12/90
12/90 - 9/50 is -7/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
12/90 = 12 × 5/90 × 5 = 60/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
9/50 = 9 × 9/50 × 9 = 81/450 - Subtract the two like fractions:
60/450 - 81/450 = 60 - 81/450 = -21/450 - After reducing the fraction, the answer is -7/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90-9/50 12/90-18/50 36/90-9/50 12/90-27/50 60/90-9/50 12/90-45/50 84/90-9/50 12/90-63/50