Subtract 24/81 from 9/30, Solve 9/30

Subtract 24/81 from 9/30

9/30 - 24/81 is 1/270.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810

Next, find the equivalent fraction of both fractional numbers with denominator 810
For the 1st fraction, since 30 × 27 = 810,
9/30 = 9 × 27/30 × 27 = 243/810
Likewise, for the 2nd fraction, since 81 × 10 = 810,
24/81 = 24 × 10/81 × 10 = 240/810
Subtract the two like fractions:
243/810 - 240/810 = 243 - 240/810 = 3/810
After reducing the fraction, the answer is 1/270

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad