John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over? Answers
A) 30%	B) 32%	C) 45%	D) 68%	E) 70%
Say John's earning last month was $100.   John spent 40 percent of his earning last month on rent --&gt; $40 on rent;   30 percent less than what he spent on rent to purchase a new dishwasher --&gt; $40*0.7= 
<gadget id="calculator">40*0.7</gadget>
<output>28</output>
$28 on the dishwasher.   Left over amount   100 - (40 + 28)= 
<gadget id="calculator">  100 - (40 + 28)</gadget>
<output>32</output>
$32.   Answer: 32%.
<result>B</result>
John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over?