Paige has stuffed 174 envelopes. This is 60% of envelopes she must stuff. How many envelopes does she need to stuff?

174=60%

just divide 174 by 60 to find out how much one percent is; 174 divided by 60 is 2.9 (you can say 3). Then multiply 3 by 40% (100%-60%=40%) and you get 120. Then add 120 to 174 to find out the total envelopes she has to stuff; 120+174=294 envelopes