Ratios: Proportion and Rates of Change

The video tutorial explains a math problem involving people in a cinema, where 3/5 are children. The ratio of girls to boys is 2:7, with 170 girls present. The tutorial guides through calculating the number of boys, total children, and adults using ratios and fractions. It also discusses the allocation of marks for each step in solving the problem.

What is the ratio of girls to boys among the children in the cinema?

How many girls are there in the cinema?

Calculate the number of boys in the cinema based on the given ratio.

What is the total number of children in the cinema?

What fraction of the people in the cinema are children?

If 3/5 of the people in the cinema are children, how can you calculate the total number of people?

How many adults are there in the cinema?