Subtract 45/36 from 4/5, Solve 4/5 - 1 9/36 as a fraction

Subtract 45/36 from 4/5

1^st number: 4/5, 2^nd number: 1 9/36

4/5 - 45/36 is -9/20.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 36 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 5 × 36 = 180,
4/5 = 4 × 36/5 × 36 = 144/180
Likewise, for the 2nd fraction, since 36 × 5 = 180,
45/36 = 45 × 5/36 × 5 = 225/180
Subtract the two like fractions:
144/180 - 225/180 = 144 - 225/180 = -81/180
After reducing the fraction, the answer is -9/20

MathStep (Works offline)

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