Subtract 15/70 from 12/45, Solve 12/45

Subtract 15/70 from 12/45

12/45 - 15/70 is 11/210.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630
Subtract the two like fractions:
168/630 - 135/630 = 168 - 135/630 = 33/630
After reducing the fraction, the answer is 11/210

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