Subtract 84/42 from 4/10
1st number: 4/10, 2nd number: 2 0/42
4/10 - 84/42 is -8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Subtract the two like fractions:
84/210 - 420/210 = 84 - 420/210 = -336/210 - After reducing the fraction, the answer is -8/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-84/42 4/20-84/42 12/10-84/42 4/30-84/42 20/10-84/42 4/50-84/42 28/10-84/42 4/70-84/42