Question

1. a survey showed that 30% of students bring their lunch to school. the survey polled 300 students. how many of the 300 students do not bring their lunch to school?

Explanation:

Step1: Find percentage of students not bringing lunch

If 30% of students bring their lunch, then the percentage of students not bringing lunch is $100\% - 30\%=70\%$.

Step2: Calculate number of students not bringing lunch

We know there are 300 students surveyed. To find the number of students not bringing lunch, we multiply the total number of students by the percentage (in decimal form). The decimal form of 70% is 0.7. So the number of students is $300\times0.7 = 210$.

Answer:

210