Subtract 3/45 from 28/42, Solve 28/42

Subtract 3/45 from 28/42

28/42 - 3/45 is 3/5.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 42 × 15 = 630,
28/42 = 28 × 15/42 × 15 = 420/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
3/45 = 3 × 14/45 × 14 = 42/630
Subtract the two like fractions:
420/630 - 42/630 = 420 - 42/630 = 378/630
After reducing the fraction, the answer is 3/5

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