PYTHON 3:

create a method called addBonus() that takes one value that should represent a percentage (e.g. addBonus(10) should represent a 10 percent bonus). The method should add a bonus amount to the percentGrade variable. For example, if the percentGrade is 70, then addBonus(20) should add 20% (i.e. 14) to percentGrade to make is 84.