Subtract 10/80 from 27/42
27/42 - 10/80 is 29/56.
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,
27/42 = 27 × 40/42 × 40 = 1080/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Subtract the two like fractions:
1080/1680 - 210/1680 = 1080 - 210/1680 = 870/1680 - After reducing the fraction, the answer is 29/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-10/80 27/42-20/80 27/84-10/80 81/42-10/80 27/42-30/80 27/42-50/80 27/42-70/80