The Mathplanet school has increased its student body from 150 students to 240 from last year. How big is the increase in percent? Options: A) 20 B) 30 C) 40 D) 50 E) 60
We begin by subtracting the smaller number (the old value) from the greater number (the new value) to find the amount of change.   240−150=90   240−150=90   Then we find out how many percent this change corresponds to when compared to the original number of students   a=r⋅b   a=r⋅b   90=r⋅150   90=r⋅150   90150=r   90150=r   0.6=r=60%   Option 60 is correct.
<result>E</result>
The Mathplanet school has increased its student body from 150 students to 240 from last year. How big is the increase in percent?