boys to girl ratio 5:4 if there was 27 students how many biys were there?
5/9 = x/27
9x = 135
x = 15
To find the number of boys when given a ratio and the total number of students, you need to do the following steps:
1. Add up the parts of the ratio: In this case, the ratio is 5:4, so the total number of parts is 5 + 4 = 9.
2. Determine the value of each part: Divide the total number of students (27) by the total number of parts (9). In this case, 27 ÷ 9 = 3.
3. Multiply the value of each part by the ratio for boys: Multiply the value from step 2 (3) by the part of the ratio representing boys (5). This gives you the number of boys. In this case, 3 × 5 = 15.
Therefore, there were 15 boys in a class of 27 students based on a boys-to-girls ratio of 5:4.