Subtract 50/90 from 15/20
15/20 - 50/90 is 7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
50/90 = 50 × 2/90 × 2 = 100/180 - Subtract the two like fractions:
135/180 - 100/180 = 135 - 100/180 = 35/180 - After reducing the fraction, the answer is 7/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-50/90 15/40-50/90 45/20-50/90 15/60-50/90 75/20-50/90