Subtract 21/18 from 50/40
1st number: 1 10/40, 2nd number: 1 3/18
50/40 - 21/18 is 1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
50/40 = 50 × 9/40 × 9 = 450/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
21/18 = 21 × 20/18 × 20 = 420/360 - Subtract the two like fractions:
450/360 - 420/360 = 450 - 420/360 = 30/360 - After reducing the fraction, the answer is 1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/40-42/18 50/80-21/18 50/40-21/36 50/40-63/18 50/40-21/54 50/40-21/90