Subtract 60/4 from 7/90, Solve 7/90

Subtract 60/4 from 7/90

1^st number: 7/90, 2^nd number: 15 0/4

7/90 - 60/4 is -1343/90.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180
Likewise, for the 2nd fraction, since 4 × 45 = 180,
60/4 = 60 × 45/4 × 45 = 2700/180
Subtract the two like fractions:
14/180 - 2700/180 = 14 - 2700/180 = -2686/180
After reducing the fraction, the answer is -1343/90

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