the enrollment in a school this year 552 this is an increase of 15% over last year enrollment how many bear enrollment last year
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Let the enrollment last year was be X
then X+15%of X=552
x+15x/100=552
100x+15x/100=552
115x=552×100
x=552×100/115
x=480
the enrollment in last year was 480
then X+15%of X=552
x+15x/100=552
100x+15x/100=552
115x=552×100
x=552×100/115
x=480
the enrollment in last year was 480
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