Subtract 1/35 from 42/21
1st number: 2 0/21, 2nd number: 1/35
42/21 - 1/35 is 69/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
1/35 = 1 × 3/35 × 3 = 3/105 - Subtract the two like fractions:
210/105 - 3/105 = 210 - 3/105 = 207/105 - After reducing the fraction, the answer is 69/35
- In mixed form: 134/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21-1/35 42/21-2/35 42/21-1/70 42/21-3/35 42/63-1/35 42/21-5/35 42/21-7/35