Subtract 30/4 from 7/90, Solve 7/90

Subtract 30/4 from 7/90

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

7/90 - 30/4 is -334/45.

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,
30/4 = 30 × 45/4 × 45 = 1350/180
Subtract the two like fractions:
14/180 - 1350/180 = 14 - 1350/180 = -1336/180
After reducing the fraction, the answer is -334/45

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