Dhoni spent 40 percent of his earning last month on rent and 20 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did Dhoni have left over?
Choices: A) 30% B) 28% C) 32% D) 33% E) 34%
Say Dhoni's earning last month was $100.   Dhoni spent 40 percent of his earning last month on rent --&gt; $40 on rent;   20 percent less than what he spent on rent to purchase a new dishwasher --&gt; $40*0.8= 
<gadget id="calculator">40*0.8</gadget>
<output>32</output>
$32 on the dishwasher.   Left over amount   100 - (40 + 32)= 
<gadget id="calculator">  100 - (40 + 32)</gadget>
<output>28</output>
$28   Answer: 28%
<result>B</result>
Dhoni spent 40 percent of his earning last month on rent and 20 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did Dhoni have left over?