Casey is making a balloon arrangement of latex balloons and mylar balloons. Each latex balloon costs $0.25 and each mylar balloo
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Let's first find how many students bring their lunch to school. This is 30% of 300. To find this value, convert the percentage to a fraction (or decimal) and multiply:
Since 90 students bring their lunch to school, we can say 210 students do not bring their lunch to school. (300 - 90 = 210)