The hamburger patties are 1/2 pound before they put them on the grill.when they come off the grill they are 1/3 pound. What is the change of percent in weight

Answer 1

Percent change = 100%(new - old)/old

new = 1/3 old = 1/2

new - old = 1/3 - 1/2 = 2/6 - 3/6 = -1/6

dividing by the old: -1/6 divided by 1/2 = -1/6 * 2/1 = -1/3

multiplying by 100% : -100/3 = -33 and 1/3 %

It is a 33 and 1/3 % DECREASE