Subtract 42/54 from 4/45, Solve 4/45

Subtract 42/54 from 4/45

4/45 - 42/54 is -31/45.

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,
4/45 = 4 × 6/45 × 6 = 24/270
Likewise, for the 2nd fraction, since 54 × 5 = 270,
42/54 = 42 × 5/54 × 5 = 210/270
Subtract the two like fractions:
24/270 - 210/270 = 24 - 210/270 = -186/270
After reducing the fraction, the answer is -31/45

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