Answer
109%
Work Step by Step
Use the percent equation,$a=p\%\times b$.
a is the part. The part is the total of the installment payments, which is found by multiplying the number of payments (24) by the payment amount (\$45).
p is the unknown percent.
b is the base. The base is the original price, \$990.
Substitute and solve the percent equation for p.
$24\times45=p\times 990\longrightarrow$ multiply
$1080=p\times990\longrightarrow$ divide both sides by 990
$1080\div990=p\times990\div990\longrightarrow$ divide
$1.\overline{09}=p$ convert decimal to percent by moving decimal 2 places right
$109.\overline{09}\%=p\%$
