UPSKILL MATH PLUS

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So, we can find that there is no difference in $$S.I$$ and $$C.I$$ for the first conversion period.
If the principal $$P$$ and the rate of interest per annum $$r$$ are given, we can use the following formula to calculate the difference in the second year between the $$C.I$$ and the $$S.I$$.
$C.I-S.I\phantom{\rule{0.147em}{0ex}}=P{\left(\frac{r}{100}\right)}^{2}$.
If the principal $$P$$ and the rate of interest per annum $$r$$ are given, we can use the following formula to calculate the difference in the third year between the $$C.I$$ and the $$S.I$$.
$C.I\phantom{\rule{0.147em}{0ex}}-S.I\phantom{\rule{0.147em}{0ex}}=\phantom{\rule{0.147em}{0ex}}P{\left(\frac{r}{100}\right)}^{2}\left(3+\frac{r}{100}\right)$.