Subtract 30/84 from 30/45, Solve 30/45

Subtract 30/84 from 30/45

30/45 - 30/84 is 13/42.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 84 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 45 × 28 = 1260,
30/45 = 30 × 28/45 × 28 = 840/1260
Likewise, for the 2nd fraction, since 84 × 15 = 1260,
30/84 = 30 × 15/84 × 15 = 450/1260
Subtract the two like fractions:
840/1260 - 450/1260 = 840 - 450/1260 = 390/1260
After reducing the fraction, the answer is 13/42

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