Subtract 21/6 from 42/4
1st number: 10 2/4, 2nd number: 3 3/6
42/4 - 21/6 is 7/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
42/4 = 42 × 3/4 × 3 = 126/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
21/6 = 21 × 2/6 × 2 = 42/12 - Subtract the two like fractions:
126/12 - 42/12 = 126 - 42/12 = 84/12 - After reducing the fraction, the answer is 7/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-21/6 42/4-42/6 42/8-21/6 42/4-21/12 42/4-63/6 42/12-21/6 42/4-21/18 42/20-21/6 42/4-21/30 42/28-21/6 42/4-21/42