MATH SOLVE

4 months ago

Q:
# Please help me some one out there thank you Use the ratio table to solve the percent problem.What percent is 32 out of 80?4%32%40%80%Use the grid to create a model to solve the percent problem.12 is 60% of what number?Enter your answer in the box.Use the grid to create a model to solve the percent problem.What is 30% of 70?9121921Use the ratio table to solve the percent problem.Part Whole? 7540 100What is 40% of 75?Enter your answer in the box.

Accepted Solution

A:

there is a percent formula that can solve all of these...

is / of = % / 100

what percent is 32 out of 80...

% = x...because this is what we r looking for

is = 32

of = 80

now sub into the formula

32/80 = x/100

cross multiply because this is a proportion

(80)(x) = (32)(100)

80x = 3200

x = 3200/80

x = 40......so 32 is 40% of 80

12 is 60% of what number...

is = 12

% = 60

of = x

sub

12/x = 60/100

cross multiply

(60)(x) = (12)(100)

60x = 1200

x = 1200/60

x = 20.....so 12 is 60% of 20

what is 30% of 70

is = x

% = 30

of = 70

x / 70 = 30/100

(100)(x) = (30)(70)

100x = 2100

x = 2100/100

x = 21.....so 21 is 30% of 70

what is 40% of 75

is = x

% = 40

of = 75

x / 75 = 40/100

(100)(x) = (75)(40)

100x = 3000

x = 3000/100

x = 30....so 30 is 40% of 75

the pic

what is 40% of 35

is = x

% = 40

of = 35

x/35 = 40/100

(100)(x) = (35)(40)

100x = 1400

x = 1400/100

x = 14.....so 14 is 40% of 35....14 goes in the box

is / of = % / 100

what percent is 32 out of 80...

% = x...because this is what we r looking for

is = 32

of = 80

now sub into the formula

32/80 = x/100

cross multiply because this is a proportion

(80)(x) = (32)(100)

80x = 3200

x = 3200/80

x = 40......so 32 is 40% of 80

12 is 60% of what number...

is = 12

% = 60

of = x

sub

12/x = 60/100

cross multiply

(60)(x) = (12)(100)

60x = 1200

x = 1200/60

x = 20.....so 12 is 60% of 20

what is 30% of 70

is = x

% = 30

of = 70

x / 70 = 30/100

(100)(x) = (30)(70)

100x = 2100

x = 2100/100

x = 21.....so 21 is 30% of 70

what is 40% of 75

is = x

% = 40

of = 75

x / 75 = 40/100

(100)(x) = (75)(40)

100x = 3000

x = 3000/100

x = 30....so 30 is 40% of 75

the pic

what is 40% of 35

is = x

% = 40

of = 35

x/35 = 40/100

(100)(x) = (35)(40)

100x = 1400

x = 1400/100

x = 14.....so 14 is 40% of 35....14 goes in the box