The answer to "Decrease 20 by 5" can be found by subtracting 5 from 20. Therefore, the answer is 15. Subtraction is the inverse operation of addition, so when you decrease a number, you are essentially subtracting a value from it.
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Oh, dude, it's like so simple. If you decrease 20 by 5, you get 15. It's like basic math, you know? So, yeah, the answer is 15. Easy peasy lemon squeezy.
This is a decrease of 20%
5
The decrease from 110 to 88 is: 20%
This is a 20% decrease in price.
132 to 125.4 is a decrease of 5%.