Janet's grades for her first semester of college were 90, 80, 70, and 100. If her semester 2 average was 82 percent, how much higher was her semester 1 average compared to her semester 2 average?
First add all Janet's grade for the first semester of college: 90 + 80 + 70 + 100 = 
<gadget id="calculator">90+80+70+100</gadget>
<output>340</output>
340.
Then divide that number by 4 to find her average grade: 340 / 4 = 
<gadget id="calculator">340/4</gadget>
<output>85</output>
85.
Then subtract her semester 2 average to find the difference: 85 - 82 = 
<gadget id="calculator">85-82</gadget>
<output>3</output>
3.

<result>3</result>