Subtract 27/80 from 30/42
30/42 - 27/80 is 211/560.
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,
30/42 = 30 × 40/42 × 40 = 1200/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
27/80 = 27 × 21/80 × 21 = 567/1680 - Subtract the two like fractions:
1200/1680 - 567/1680 = 1200 - 567/1680 = 633/1680 - After reducing the fraction, the answer is 211/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-27/80 30/42-54/80 30/84-27/80 90/42-27/80 30/42-81/80