Given:
Principal = $1900
interest rate = 5.9%
Period = 18 months
Required : Simple interest
The formula for calculating simple interest is:
[tex]\begin{gathered} S\mathrm{}I\text{ = }\frac{P\text{ }\times\text{ r }\times\text{ t}}{100} \\ \text{Where P is the principal} \\ r\text{ is the rate of interest} \\ t\text{ is the time in years} \end{gathered}[/tex]Substituting the given values into the formula:
[tex]\begin{gathered} SI\text{ = }\frac{1900\text{ }\times\text{ 5.9 }\times\text{ }\frac{18}{12}}{100} \\ =\text{ }168.15 \end{gathered}[/tex]Hence, the simple interest is $168.15
