Subtract 10/42 from 1/84
1/84 - 10/42 is -19/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
10/42 = 10 × 2/42 × 2 = 20/84 - Subtract the two like fractions:
1/84 - 20/84 = 1 - 20/84 = -19/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84-10/42 1/84-20/42 1/84-10/84 3/84-10/42 1/84-30/42 5/84-10/42 1/84-50/42 7/84-10/42 1/84-70/42