Explain the algebraic error in the student’s work. Then, state how the equation r = StartFraction (uppercase A minus uppercase P) Over t EndFraction can be modified to produce the correct result.

The student did not distribute properly to get A = P + Prt.

The equation can be fixed by putting a factor of P in the denominator: r = (A - P) / (Pt)

I just took this part of the lesson. Good luck to all!