Subtract 30/36 from 6/42
6/42 - 30/36 is -29/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
6/42 = 6 × 6/42 × 6 = 36/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
30/36 = 30 × 7/36 × 7 = 210/252 - Subtract the two like fractions:
36/252 - 210/252 = 36 - 210/252 = -174/252 - After reducing the fraction, the answer is -29/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-30/36 6/42-60/36 6/84-30/36 6/42-30/72 18/42-30/36 6/42-90/36 30/42-30/36