Subtract 21/35 from 75/42
1st number: 1 33/42, 2nd number: 21/35
75/42 - 21/35 is 83/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
75/42 = 75 × 5/42 × 5 = 375/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Subtract the two like fractions:
375/210 - 126/210 = 375 - 126/210 = 249/210 - After reducing the fraction, the answer is 83/70
- In mixed form: 113/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/42-42/35 75/84-21/35 75/42-21/70 75/42-63/35