By what percent will the number change if you find 1/3 of a number?

Question

This is also very hard PLS help me...

Answer 1

x - x/3 = (2/3)x

It decreased by 2/3 or about -67% change

if gasoline were $3 a gallon and it dropped to $1 per gallon, which is 1/3 the previous price, that's a $2 drop. $2 is 2/3 of $3. 2/3 = about .67 = 67% It's a -67% change in price