Subtract 45/84 from 4/10, Solve 4/10

Subtract 45/84 from 4/10

4/10 - 45/84 is -19/140.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 10 × 42 = 420,
4/10 = 4 × 42/10 × 42 = 168/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
45/84 = 45 × 5/84 × 5 = 225/420
Subtract the two like fractions:
168/420 - 225/420 = 168 - 225/420 = -57/420
After reducing the fraction, the answer is -19/140

MathStep (Works offline)

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