Subtract 40/84 from 15/75
15/75 - 40/84 is -29/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 75 × 28 = 2100,
15/75 = 15 × 28/75 × 28 = 420/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
40/84 = 40 × 25/84 × 25 = 1000/2100 - Subtract the two like fractions:
420/2100 - 1000/2100 = 420 - 1000/2100 = -580/2100 - After reducing the fraction, the answer is -29/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75-40/84 15/75-80/84 45/75-40/84