Subtract 4/80 from 6/42
6/42 - 4/80 is 13/140.
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,
6/42 = 6 × 40/42 × 40 = 240/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
4/80 = 4 × 21/80 × 21 = 84/1680 - Subtract the two like fractions:
240/1680 - 84/1680 = 240 - 84/1680 = 156/1680 - After reducing the fraction, the answer is 13/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-4/80 6/42-8/80 6/84-4/80 18/42-4/80 6/42-12/80 30/42-4/80 6/42-20/80 6/42-28/80