Subtract 12/72 from 40/75
40/75 - 12/72 is 11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 75 × 24 = 1800,
40/75 = 40 × 24/75 × 24 = 960/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
12/72 = 12 × 25/72 × 25 = 300/1800 - Subtract the two like fractions:
960/1800 - 300/1800 = 960 - 300/1800 = 660/1800 - After reducing the fraction, the answer is 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/75-12/72 40/75-24/72 40/75-36/72 40/75-60/72 40/75-84/72