Subtract 50/4 from 20/90
1st number: 20/90, 2nd number: 12 2/4
20/90 - 50/4 is -221/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
50/4 = 50 × 45/4 × 45 = 2250/180 - Subtract the two like fractions:
40/180 - 2250/180 = 40 - 2250/180 = -2210/180 - After reducing the fraction, the answer is -221/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-50/4 20/90-50/8 60/90-50/4 20/90-50/12 20/90-50/20 20/90-50/28