Subtract 81/84 from 42/4
1st number: 10 2/4, 2nd number: 81/84
42/4 - 81/84 is 267/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
42/4 = 42 × 21/4 × 21 = 882/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Subtract the two like fractions:
882/84 - 81/84 = 882 - 81/84 = 801/84 - After reducing the fraction, the answer is 267/28
- In mixed form: 915/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-81/84 42/8-81/84 42/12-81/84 42/20-81/84 42/28-81/84