Subtract 75/21 from 70/25
1st number: 2 20/25, 2nd number: 3 12/21
70/25 - 75/21 is -27/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
70/25 = 70 × 21/25 × 21 = 1470/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
75/21 = 75 × 25/21 × 25 = 1875/525 - Subtract the two like fractions:
1470/525 - 1875/525 = 1470 - 1875/525 = -405/525 - After reducing the fraction, the answer is -27/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/50-75/21 70/25-75/42 70/75-75/21 70/25-75/63