Mr. and Mrs. McPherson have to renew their rent by the end of the year. They agreed that Mrs. McPherson would raise 30% of the money. If their rent is $1200 per year, how much does Mr. McPherson need to raise to complete the rent?
30% of $1200 is (30/100)*$1200 = $
<gadget id="calculator">(30/100)*1200</gadget>
<output>360</output>
360.
Mrs. McPherson will pay $360 leaving $1200-$360 = $
<gadget id="calculator">1200-360</gadget>
<output>840</output>
840 which Mr. McPherson will have to raise.

<result>840</result>