Subtract 50/36 from 21/45
1st number: 21/45, 2nd number: 1 14/36
21/45 - 50/36 is -83/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
50/36 = 50 × 5/36 × 5 = 250/180 - Subtract the two like fractions:
84/180 - 250/180 = 84 - 250/180 = -166/180 - After reducing the fraction, the answer is -83/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45-50/36 21/90-50/36 21/45-50/72 63/45-50/36