Subtract 42/4 from 9/42
1st number: 9/42, 2nd number: 10 2/4
9/42 - 42/4 is -72/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
42/4 = 42 × 21/4 × 21 = 882/84 - Subtract the two like fractions:
18/84 - 882/84 = 18 - 882/84 = -864/84 - After reducing the fraction, the answer is -72/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-42/4 9/42-84/4 9/84-42/4 9/42-42/8 27/42-42/4 9/42-42/12 45/42-42/4 9/42-42/20 63/42-42/4 9/42-42/28