Percent
Proportions
Unit 7 day 3
proportion
In a percent ____________, one of the part
numbers, called the ______is being compared base
whole
to the _______, called the ______. The other percent
ratio is the ________, written as a fraction, denominator
whose ______ is 100.
Part = Percent
Whole 100
Essential Question:
In a percent proportion, what does the
numerator and denominator represent?
We can use our percent proportion to find any of the missing pieces.
Five is what percent of 8? You know the _____ and the _______ so you solve to find the ________. Set up the proportions, then cross multiply to solve for the missing piece.
Watch for the secret key words ___ and ___. IS is the part and OF is the whole.
Part (is) =
Whole(of) Percent
100
_____ ______
= 100
What is 5.5% of 650? You know the ______ and the _______ so you solve to find the _______. Set up the proportions, then cross multiply to solve for the missing piece.
52 is 40% of what number? You know the ______ and the _______ so you solve to find the _______. Set up the proportions, then cross multiply to solve for the missing piece.
Part (is)
= Percent
Whole (of) 100
Part (is) _____ ______
=
100
_____ = ______
100
= Percent
Whole (of) 100
What percent of 4 is 7? You know the ______ and the _______ so you solve to find the _______. Set up the proportions, then cross multiply to solve for the missing piece.
Part (is)
Whole (of) =
Percent
100
_____ = ______
100