Subtract 8/80 from 84/42
1st number: 2 0/42, 2nd number: 8/80
84/42 - 8/80 is 19/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
84/42 = 84 × 40/42 × 40 = 3360/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
8/80 = 8 × 21/80 × 21 = 168/1680 - Subtract the two like fractions:
3360/1680 - 168/1680 = 3360 - 168/1680 = 3192/1680 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-16/80 84/42-24/80 84/42-40/80 84/42-56/80