Question

The formula for simple interest plus starting principal, where A = amount, P= principal, r = interest rate period, and t = time, is given below A = P +Prt

Solve the equation for rate.

Answer 1

To solve for the interest rate (r) in the simple interest formula A = P + Prt, you need to isolate r on one side of the equation by subtracting P and dividing by Pt.

Step-by-step explanation:

The formula for simple interest is given by:

A = P + Prt

To solve the equation for the interest rate (r), we need to isolate it on one side of the equation. Here are the steps:

1. Subtract P from both sides of the equation:
   A - P = Prt
2. Divide both sides of the equation by Pt:
   (A - P) / Pt = r

Therefore, the formula to calculate the interest rate is r = (A - P) / Pt.