calculate the percent yield

Question

Im having problems with this question.

calculate the percent yield to two decimal places, leave off final zeros

Theoretical: 78.43 g Actual: 66.4 g

Answer 1

% Yield = (actual/theoretical) x 100. So, (66.4/78.43) x 100 = 84.66% This SHOULD be expressed to 84.7 % according to the rules of sig figs. Your problem states that you are to express the answer to 2 decimal places however, so the answer would stay at 84.66%