If $P$ is the sum on which interest is compounded annually at a rate of $R\%$ per annum, then the amount at the end of $n$ years, will be $A =P{\left(1+\frac{R}{k}\right)}^n$, then $k=$

_____ $=A-P$. (Interest / Rate)  

The time period after which the interest is added each time to form a new principal, is called the _____. (interest period / conversion period) 

When the interest is compounded half-yearly, there are _____ (two / one) conversion periods in a year.

If the interest is compounded half-yearly, then rate will be _____ of the annual rate. (half / one-fourth)

If the interest is compounded quarterly, then there will be _____  conversion periods in a year. (two / four)

If interest is compounded quarterly, then rate will be _____ of the annual rate. (One-fourth / One-third/ Half / Three-fourth).

To calculate the growth of a bacteria if the rate of growth is known, then the formula for calculation of amount in compound interest can be used.

Compound interest is the interest calculated on the previous year's amount ?