Subtract 81/28 from 42/4
1st number: 10 2/4, 2nd number: 2 25/28
42/4 - 81/28 is 213/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
42/4 = 42 × 7/4 × 7 = 294/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
81/28 = 81 × 1/28 × 1 = 81/28 - Subtract the two like fractions:
294/28 - 81/28 = 294 - 81/28 = 213/28 - In mixed form: 717/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-81/28 42/8-81/28 42/4-81/56 42/12-81/28 42/4-81/84 42/20-81/28 42/28-81/28