How do you find the Monthly Payment on a \$100 Loan?

Okay.. My final exam is Monday, and I've searched all over the web to find the formula of how to find the monthly payment on a \$100 loan... Here is what I am given in a chart: Loan Amount/Terms in Months/Annual %... show more Okay.. My final exam is Monday, and I've searched all over the web to find the formula of how to find the monthly payment on a \$100 loan... Here is what I am given in a chart:
Loan Amount/Terms in Months/Annual % Rate:
\$2,000/30/10%
\$3,500/24/9%
\$11,200/48/12%
\$3,570/18/15%
\$1,125/36/11%
\$6,500/42/14%

With this information it asks for the Monthly Payment on a \$100 loan, Monthly Payment, and Finance Charge, BUT I can't find the Monthly Payment or Finance charge without knowing how to find the Monthly Payment of a \$100 Loan. Grrr. Frustrating.

It would be sweet if you knew the formula so I could study it. I don't need to straight answers because that won't do me any good for my test. Test is THIS Monday, so the sooner the better. THANKS!
4 answers 4