Subtract 18/21 from 75/42
1st number: 1 33/42, 2nd number: 18/21
75/42 - 18/21 is 13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
75/42 = 75 × 1/42 × 1 = 75/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Subtract the two like fractions:
75/42 - 36/42 = 75 - 36/42 = 39/42 - After reducing the fraction, the answer is 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/42-36/21 75/84-18/21 75/42-18/42 75/42-54/21 75/42-18/63 75/42-90/21