## Introductory Algebra for College Students (7th Edition)

r=$\frac{I}{Pt}$ Interest formula
I=Prt Prt=I $\frac{Prt}{Pt}$=$\frac{I}{Pt}$ r=$\frac{I}{Pt}$ The given is the interest formula which means interest equals the product of the principal, the interest rate, and time.