THE NUMBER of bubles in the school is a school is 720 . one day , 7.5% of them were absent FIND THE NUMBER OF THE PERSENT PUPILS THAT DAY

1. Break Down the Problem

We have a total number of bubbles (pupils) in the school and we need to determine how many were present when 7.5% were absent.

2. Relevant Concepts

To find the number of present pupils, we can use the formula: $\text{Number of Present Pupils} = \text{Total Pupils} - \text{Number of Absent Pupils}$

The number of absent pupils can be calculated as: $\text{Number of Absent Pupils} = \text{Total Pupils} \times \left(\frac{\text{Percentage Absent}}{100}\right)$

3. Analysis and Detail

1. Total Pupils = 720
2. Percentage Absent = 7.5%

Calculating the number of absent pupils: $\text{Number of Absent Pupils} = 720 \times \left(\frac{7.5}{100}\right) = 720 \times 0.075 = 54$

Now, calculating the number of present pupils: $\text{Number of Present Pupils} = 720 - 54 = 666$

4. Verify and Summarize

We can check that 54 is indeed 7.5% of 720: $\frac{54}{720} \times 100 = 7.5\%$ Thus, the calculations are verified.

Final Answer

The number of present pupils that day was 666.