What is the percent of decrease from 110 to 77?
The decrease is
Let's start by asking ourselves a similar, yet simpler, question: what is the percent decrease from $10.00 to $9.00? In other words, if a $10 item is sold for $9, what percent did the buyer save?
This seems a bit more intuitive. The answer is 10%. But how did we get that? Well, we figured out the difference between the two prices (
This is the math we did in our head:
#("original value "-" new value")/"original value"#
We measured how big the difference between the two numbers is, when compared to the original number. This formula works all the time, to find percentage increases/decreases. Just plug and chug!
In this question, the original value is 110, and the new value is 77:
(To turn a decimal number into a percentage, multiply the number by 100, then add the % sign.)
Any percent increase or decrease can be determined by using the process:
The change is the amount of increase or decrease, simply subtract:
Bigger value - smaller value.
In this case: