Subtract 75/50 from 20/72
1st number: 20/72, 2nd number: 1 25/50
20/72 - 75/50 is -11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 50 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
20/72 = 20 × 25/72 × 25 = 500/1800 - Likewise, for the 2nd fraction, since 50 × 36 = 1800,
75/50 = 75 × 36/50 × 36 = 2700/1800 - Subtract the two like fractions:
500/1800 - 2700/1800 = 500 - 2700/1800 = -2200/1800 - After reducing the fraction, the answer is -11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72-75/50 60/72-75/50