Subtract 70/21 from 9/25
1st number: 9/25, 2nd number: 3 7/21
9/25 - 70/21 is -223/75.
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,
9/25 = 9 × 21/25 × 21 = 189/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
70/21 = 70 × 25/21 × 25 = 1750/525 - Subtract the two like fractions:
189/525 - 1750/525 = 189 - 1750/525 = -1561/525 - After reducing the fraction, the answer is -223/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/25-70/21 9/50-70/21 9/25-70/42 27/25-70/21 9/75-70/21 9/25-70/63 45/25-70/21 63/25-70/21