A building has windows on two sides only. There are 30 windows on the front side and 30 windows on the back side. Of these, 6 are open on the front side and 12 are open on the back side. What percent of windows are open in the building?

A16 ounce bottle of orange juice says it contains 200 milligrams of vitamin c which is 250% uh just read the paper it explains it better

Pls! does anybody know a shortcut for answering these types of questions in the future?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)