Subtract 18/72 from 50/20
1st number: 2 10/20, 2nd number: 18/72
50/20 - 18/72 is 9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
50/20 = 50 × 18/20 × 18 = 900/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Subtract the two like fractions:
900/360 - 90/360 = 900 - 90/360 = 810/360 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/20-36/72 50/40-18/72 50/20-54/72 50/60-18/72 50/20-90/72