Subtract 72/20 from 75/50
1st number: 1 25/50, 2nd number: 3 12/20
75/50 - 72/20 is -21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 50 × 2 = 100,
75/50 = 75 × 2/50 × 2 = 150/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
72/20 = 72 × 5/20 × 5 = 360/100 - Subtract the two like fractions:
150/100 - 360/100 = 150 - 360/100 = -210/100 - After reducing the fraction, the answer is -21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/50-72/40 75/50-72/60