a percentage is part of a whole number. 70% of 1 is .7, for example, and 75% of 4 would be 3. a handy trick is to divide the smaller number by the bigger one (.7 ÷ 1, for example, or 3 ÷ 4).
Two angles are called complementary if their measures add to 90 degrees, and called supplementary if their measures add to 180 degrees. ... For example, a 50-degree angle and a 40-degree angle are complementary; a 60-degree angle and a 120-degree angle are supplementary
