Step-by-step explanation:
How to find percentage
Example:
You have a 5% discount for a $40 item. What is the new price?
1. You turn 5% into a decimal which is 0.05 because 5% is 5 out of 100.
2. Make an expression: New price = y SO...
y = 40 - (0.05)40
y = 40 - 2
y = 38
So the new price is $38 and that is how you find percentage.
For adding money to the bill as shown in your problem number thirteen I will explain below.
1. Again turn 20% into a decimal which is 0.2 because 20% is 20 out of 100.
2. Find 20% of 141$.
3. Expression again but not subtracting this time, we are adding the new percentage to the original amount. y = new amount
4. y = 141 + (0.2)141
y = 141 + 28.20 <---- that is the gratuity amount added!!
y = 169.20
5. So the gratuity added to the party of 6 with a bill of $141 is $28.20 and the amount they pay now is $169.20!
I HOPE THIS HELPS!!!
