The answer is 0.04 (I hope). Here is an explanation:
Answer:

Step-by-step explanation:
The formula for calculating percentage is

The "part" is the number of single-shot espressos
The "whole" is the total number of espressos.


Answer:
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72 times square root of 2
4x+3x=7x
18 girls-5%
Total no: of girlsx5/100=18
Total-100x18/5-360 girls
4x+3607x
360-7x-4x
360-3x
x=360/3-120
4x=4x120=480
3x=3x120=360
Total no: of students=480+360-840