Say the percentage increase is 25%. If you have the whole number of 30 then you would multiply 30 by .25. You should therefore get 7.5 once both are multiplied. That means you should add 7.5 to 30, and your final answer will be 37.5.
A) the angle is 105 because its supplemental with the 75 degree angle B) the angle's 75 because the given 75 degree angle is correspondant C) 105 again because they are supplemental
