Question

The ratio of boys to girls at the assembly was 5 to 4. If there were 180 students at the assembly, how many girls were there? Explain why your answer is reasonable.

Answer 1

The ratio
b : g = 5 : 4
the sum of the ratio = 5 + 4 = 9

Find the number of girls
girls = the ratio of girls/the sum of the ratio × the sum of students
girls = 4/9 × 180
girls = (4 × 180)/9
girls = 720/9
girls = 80

There are 80 girls

Answer 2

Boys to girls ratio - 5 to 4.
5 + 4 = 9.
180 divided by 9 equals 20.
20 times 4 equals 80.