Okay, lets apply logic.
I'm amusing you're horrible at maths so I will deal with 10's due to that's a standard form of counting you will be familiar with.
First of get 10% of 109 which is 10.9.
Now since you want 20% that's just 10% doubled, so 10.9*2 = 21.8.
So the answer is 21.8.
You can back trace this but times 21.8 by 5 to make it back to a 100% and the answer will be 109.
Congratulations, you are now educated.
20 percent off of 1550.00 is 310.00.
20 percent of 150 is 120.00 or 30.00 off.
16.
The total after taking off the percentage is $640.00
"20 percent off" means 80 percent still on.80 percent = 0.80.8 x 14.99 = 11.992
100 off
1.90 off
10900
165.60
319,200
10.598
348