Subtract 90/4 from 9/45, Solve 9/45

Subtract 90/4 from 9/45

1^st number: 9/45, 2^nd number: 22 2/4

9/45 - 90/4 is -223/10.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 45 × 4 = 180,
9/45 = 9 × 4/45 × 4 = 36/180
Likewise, for the 2nd fraction, since 4 × 45 = 180,
90/4 = 90 × 45/4 × 45 = 4050/180
Subtract the two like fractions:
36/180 - 4050/180 = 36 - 4050/180 = -4014/180
After reducing the fraction, the answer is -223/10

MathStep (Works offline)

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