The cost of a one-family home was $ 120,000 in 1980. In 1988, the price had increased to $ 168,000. What was the percent increase in the cost of the home?  Pick one
A) 60%
B) 50%
C) 55%
D) 40%
E) 33.3%
Increase = 168000-120000= 
<gadget id="calculator">168000-120000</gadget>
<output>48_000</output>
48000   % increase= 48000*100/120000= 
<gadget id="calculator">48000*100/120000</gadget>
<output>40</output>
40%   Answer: option 40%
<result>D</result>
The cost of a one-family home was $ 120,000 in 1980. In 1988, the price had increased to $ 168,000. What was the percent increase in the cost of the home?