Subtract 18/64 from 10/40, Solve 10/40

Subtract 18/64 from 10/40

10/40 - 18/64 is -1/32.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 64 is 320

Next, find the equivalent fraction of both fractional numbers with denominator 320
For the 1st fraction, since 40 × 8 = 320,
10/40 = 10 × 8/40 × 8 = 80/320
Likewise, for the 2nd fraction, since 64 × 5 = 320,
18/64 = 18 × 5/64 × 5 = 90/320
Subtract the two like fractions:
80/320 - 90/320 = 80 - 90/320 = -10/320
After reducing the fraction, the answer is -1/32

MathStep (Works offline)

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