Question

The price of an item yesterday was $80. Today, the price rose to $172. How do you find the percentage increase?

Answer 1

`115%`

Explanation:

`"to calculate "color(blue)"percentage increase"` use.

`color(red)(bar(ul(|color(white)(2/2)color(black)(%" increase "="increase"/"original" xx100)color(white)(2/2)|)))`

`"increase in price "=$(172-80)=$92`

`"original price "=$80`

`rArr%" increase "=92/cancel(80)^4xxcancel(100)^5`

`color(white)(rArr%increasex)=23xx5=115%`