Subtract 21/75 from 84/42
1st number: 2 0/42, 2nd number: 21/75
84/42 - 21/75 is 43/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 75 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
84/42 = 84 × 25/42 × 25 = 2100/1050 - Likewise, for the 2nd fraction, since 75 × 14 = 1050,
21/75 = 21 × 14/75 × 14 = 294/1050 - Subtract the two like fractions:
2100/1050 - 294/1050 = 2100 - 294/1050 = 1806/1050 - After reducing the fraction, the answer is 43/25
- In mixed form: 118/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-42/75 84/42-63/75