Respuesta :

SwivleChair
If the original was $30 and the new is $18 then there was a decrease because 30 is less than 18 it equals a difference of 12

The basic logic says:  "What percent of 25 is 18?"

18 = (x/100)25

x = 1800/25

x = 72%

18 is 72% of 25

This is a decrease of 28% from the original number

0r a change of -28%

 

Follow the same logic with a change from 36 to 45

45 = (x/100)36

When you solve for x it will be greater than 100.

Subtract the original 100% from it to get the

POSITIVE change in percentage.

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