Subtract 70/50 from 12/72
1st number: 12/72, 2nd number: 1 20/50
12/72 - 70/50 is -37/30.
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,
12/72 = 12 × 25/72 × 25 = 300/1800 - Likewise, for the 2nd fraction, since 50 × 36 = 1800,
70/50 = 70 × 36/50 × 36 = 2520/1800 - Subtract the two like fractions:
300/1800 - 2520/1800 = 300 - 2520/1800 = -2220/1800 - After reducing the fraction, the answer is -37/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/72-70/50 36/72-70/50 60/72-70/50 84/72-70/50