How do 250 percent arive at 2.5?

Answer 1

I modified your question to read 2.5 rather than 2.25

1 percent is 1 part of 100, with 100% = 1

Think of the word cent (like a penny), there are 100 cents in a dollar.

to find the number value of a percentage, divide the percentage by 100 and remove the percent sign.

Just like 250 cents = $2.50; 250% = 2.50

In a word problem, if you see the words 'percent of' then the number value of the percentage is multiplied by whatever follows 'of'.

example: what is 20 percent of 15? 20% = 0.20, and 0.20 * 15 = 3

Percentages can definitely be greater than 100%, especially when talking about finances and the economy, example: Gasoline is up 250% in the last 5 years.

( that is just made-up, I don't know the exact percentage that gas has gone up, but you get the idea). But if that was what you were given, then you could use the number to find the price from 5 years ago. Note: if they say 'increased by; then the original amount is equal to 100%, so you have to add 100% before you can multiply. So if something increased by 50%, you would multiply by 150% (or 1.50) to find the new price.