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"Normal Pressure" varies depending on where you live. Most municipalities try to provide water between 40 and 80 psi. That's a pretty big range. How much water comes out of your garden hose varies depending on your service pressure, the length of hose, how much water your using in your house at that moment, and where the hose is located in relation to your water service. The most accurate way for you to figure it out is to take a 5 gallon bucket (the orange Home Depot buckets are about 5 gals) and time how long it takes you to fill it. If it takes 1 minute to fill 5 gallons then you're only getting a flow rate of 5 gallons per minute (this would be uncommonly slow). If it takes 30 seconds, then you're at 10 gpm. 20 seconds -> 15 gpm, etc. If you don't need to be terribly accurate, it's pretty safe to assume somewhere between 15 to 30 gpm for normal residential service. 15 gpm is on the lame end and 30 gpm would be pretty impressive for a garden hose.
QF = V / t = 80 gal / 16/3 min = 15 GPM<-----------------------------
The operation to get from 80 to 8 is division. Divide 80 by ten, and the answer is 8.
7 and 29 over 80 as a decimal would be7.29over 80
< 80%