Subtract 80/84 from 21/75
21/75 - 80/84 is -353/525.
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,
21/75 = 21 × 28/75 × 28 = 588/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
80/84 = 80 × 25/84 × 25 = 2000/2100 - Subtract the two like fractions:
588/2100 - 2000/2100 = 588 - 2000/2100 = -1412/2100 - After reducing the fraction, the answer is -353/525
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75-80/84 63/75-80/84