Subtract 9/28 from 6/90, Solve 6/90

Subtract 9/28 from 6/90

6/90 - 9/28 is -107/420.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 90 × 14 = 1260,
6/90 = 6 × 14/90 × 14 = 84/1260
Likewise, for the 2nd fraction, since 28 × 45 = 1260,
9/28 = 9 × 45/28 × 45 = 405/1260
Subtract the two like fractions:
84/1260 - 405/1260 = 84 - 405/1260 = -321/1260
After reducing the fraction, the answer is -107/420

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