Essential Question: In a percent proportion, what …

[Pages:2]Percent Proportions

Unit 7 day 3

Essential Question: In a percent proportion, what does the numerator and denominator represent?

In a percent __p_r_o_p_o_r_ti_o_n__, one of the numbers, called the __p_a_rt__is being compared to the __w_h_o_le__, called the _b_a_s_e__. The other ratio is the __p_e_rc_e_nt__, written as a fraction, whose _de_no_m_in_at_or is 100.

Part Whole

=

Percent 100

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) = Percent

Whole(of)

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.

Part (is) Whole (of)

=

Percent 100

_____

=

______ 100

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

_____ = ______ 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

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