Question

Lance lopes went to his bank to find out how long it will take for $1,500 to amount to $2,700 at 15% simple interest. can you solve lance's problem? (round time in years to the nearest tenth.)

Answer 1

To find simple interest: 

Time = Interest/(Principle)(Rate)

Interest is the amount of interest paid
Principle is the amount you lent or borrow
Rate is the percentage of principle charged as interest each year
Time is the years of the loan

P=Principle amount of $1,500
I=Interest amount of $1,200 (Take the new amount of $2,700 and subtract from the principle that is $1,500 which gives you $1,200)
r= as a decimal .15 (15%/100)
t=unknown

T=I/PR

T=1,200/(1,500)(.15)
T=1,200/225
T=5.3 years 

It would take Lance roughly 5.3 years