Question : What is the LCM of 0.15, 0.18, and 0.45?
Option 1: 0.9
Option 2: 0.09
Option 3: 0.81
Option 4: 0.6
Correct Answer: 0.9
Solution : $0.15 = \frac{15}{100}$ $0.18 =\frac{18}{100}$ $0.45 =\frac{45}{100}$ We know, LCM of fractions = $\frac{\text{LCM of numerators}}{\text{HCF of denominators}}$ So, LCM of $ \frac{15}{100}, \frac{18}{100}$, and $\frac{45}{100}=\frac{90}{100}=0.9$ Hence the correct answer is 0.9.
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