Subtract 80/45 from 7/4, Solve 1 3/4

Subtract 80/45 from 7/4

1^st number: 1 3/4, 2^nd number: 1 35/45

7/4 - 80/45 is -1/36.

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,
7/4 = 7 × 45/4 × 45 = 315/180
Likewise, for the 2nd fraction, since 45 × 4 = 180,
80/45 = 80 × 4/45 × 4 = 320/180
Subtract the two like fractions:
315/180 - 320/180 = 315 - 320/180 = -5/180
After reducing the fraction, the answer is -1/36

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