Jovita made 300 greeting cards. she sold 40% of the cards, gave 85% of the remaining cards to her friends, and kept the rest of the cards for herself. how many greeting cards did she keep for herself.

She  kept 27 for herself because 40% of 300 greeting cards is 120, so the remaining is 180 cards. 85% of 180 cards is 153 leaving you only 27 cards. to find the percent of something just multiply them for instance when trying to find 40% of 300 cards just multiply 300 by .4