in the given problem 40 is our base becouse if represents the(blank) 75% Is the rate becouse it is ratio between the(blank) and the.(blank) 30 pupils is the percentage becouse it is a part of the.(blank)

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.