Find the rate at which naira 280, will earn naira 21.00k simple lnterest

To find the rate at which naira 280 will earn naira 21.00k simple interest, we need to use the formula:

Simple Interest = (Principal x Rate x Time) / 100

Where:

Principal = naira 280
Simple Interest = naira 21.00k
Time = 1 year (assuming the interest is for 1 year)

Substituting the values in the formula, we get:

naira 21.00k = (naira 280 x Rate x 1) / 100

Simplifying the equation, we get:

Rate = (naira 21.00k x 100) / (naira 280 x 1)
Rate = 7500 / 280
Rate = 26.79%

Therefore, the rate at which naira 280 will earn naira 21.00k simple interest is 26.79%.