Answer:
$17 with 10% off is the cheaper book
Step-by-step explanation:
Hello
to find the cheaper price, we need to find those prices and the compare
Step 1
20% off the original price of $19.99
by using a rule of three
if $19.99=100%
x? $ =20%
the relations are
[tex]\frac{19.99}{100} =\frac{x}{20}[/tex]
isolating x
[tex]x=\frac{19.99*20}{100}\\x=3.99[/tex]
the discount is $3.99
the price =original price- discount
price=$19.99-3.99
price(1) = $15.995
Step 2
10% off the original price of $17
by using a rule of three
if $17=100%
x? $ =10%
the relations are
[tex]\frac{17}{100} =\frac{x}{10}[/tex]
isolating x
[tex]x=\frac{17*10}{100}\\x=1.7[/tex]
the discount is $1.7
the price =original price- discount
price=$17-1.7
price(2) = $15.3
price(1) >price(2)
$15.995>$15.3
hence, the cheaper is the % 17 book
Have a great day.
