Subtract 42/8 from 9/42
1st number: 9/42, 2nd number: 5 2/8
9/42 - 42/8 is -141/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
9/42 = 9 × 4/42 × 4 = 36/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
42/8 = 42 × 21/8 × 21 = 882/168 - Subtract the two like fractions:
36/168 - 882/168 = 36 - 882/168 = -846/168 - After reducing the fraction, the answer is -141/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42-42/8 9/42-84/8 9/84-42/8 9/42-42/16 27/42-42/8 9/42-42/24 45/42-42/8 9/42-42/40 63/42-42/8 9/42-42/56