Subtract 6/4 from 90/45, Solve 2 0/45

Subtract 6/4 from 90/45

1^st number: 2 0/45, 2^nd number: 1 2/4

90/45 - 6/4 is 1/2.

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,
90/45 = 90 × 4/45 × 4 = 360/180
Likewise, for the 2nd fraction, since 4 × 45 = 180,
6/4 = 6 × 45/4 × 45 = 270/180
Subtract the two like fractions:
360/180 - 270/180 = 360 - 270/180 = 90/180
After reducing the fraction, the answer is 1/2

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