Subtract 72/45 from 6/4, Solve 1 2/4

Subtract 72/45 from 6/4

1^st number: 1 2/4, 2^nd number: 1 27/45

6/4 - 72/45 is -1/10.

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

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 4 × 45 = 180,
6/4 = 6 × 45/4 × 45 = 270/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180
Subtract the two like fractions:
270/180 - 288/180 = 270 - 288/180 = -18/180
After reducing the fraction, the answer is -1/10

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