Subtract 90/36 from 50/30
1st number: 1 20/30, 2nd number: 2 18/36
50/30 - 90/36 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
50/30 = 50 × 6/30 × 6 = 300/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
90/36 = 90 × 5/36 × 5 = 450/180 - Subtract the two like fractions:
300/180 - 450/180 = 300 - 450/180 = -150/180 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/60-90/36 50/30-90/72 50/90-90/36