Becky bought 20 apples for 45 cents each and received a $1 discount. Kelly bought 20 apples for 50 cents each and received a 10 percent discount. How much more did Kelly pay than Becky?
Before the discount, Becky would have paid 20 apples x $0.45/apple = $
<gadget id="calculator">20*0.45</gadget>
<output>9</output>
9.
With the discount, Becky paid $9 - $1 = $
<gadget id="calculator">9-1</gadget>
<output>8</output>
8.
Before the discount Kelly would have paid 20 apples x $0.50/apple = $
<gadget id="calculator">20*0.5</gadget>
<output>10</output>
10.
With a 10 percent discount Kelly paid ($10 x 10)/100 = $
<gadget id="calculator">(10*10)/100</gadget>
<output>1</output>
1 less.
In total Kelly paid $10 - $1 = $
<gadget id="calculator">10-1</gadget>
<output>9</output>
9.
Kelly paid $9 - $8 = $
<gadget id="calculator">9-8</gadget>
<output>1</output>
1 more than Becky.

<result>1</result>