Subtract 15/54 from 7/45, Solve 7/45

Subtract 15/54 from 7/45

7/45 - 15/54 is -11/90.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 54 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 45 × 6 = 270,
7/45 = 7 × 6/45 × 6 = 42/270
Likewise, for the 2nd fraction, since 54 × 5 = 270,
15/54 = 15 × 5/54 × 5 = 75/270
Subtract the two like fractions:
42/270 - 75/270 = 42 - 75/270 = -33/270
After reducing the fraction, the answer is -11/90

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