Question 2 64 is 40% of what number? А 128 B 256 160 D 26

Question

Question 2
64 is 40% of what number?
А
128
B
256
160
D
26

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RuslanHeatt 5 years 2021-07-26T15:01:41+00:00 2 Answers 15 views 0

Answers ( )

  1. Ladonna
    0
    2021-07-26T15:02:49+00:00
    Reply

    C: 160 is the correct answer

  2. thanhcong
    0
    2021-07-26T15:03:03+00:00
    Reply

    Answer:

    answer is 160

    Step-by-step explanation:

    1. We assume, that the number 40 is 100% – because it’s the output value of the task.

    2. We assume, that x is the value we are looking for.

    3. If 100% equals 40, so we can write it down as 100%=40.

    4. We know, that x% equals 64 of the output value, so we can write it down as x%=64.

    5. Now we have two simple equations:

    1) 100%=40

    2) x%=64

    where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

    100%/x%=40/64

    6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

    7. Solution for 64 is what percent of 40

    100%/x%=40/64

    (100/x)*x=(40/64)*x    

    100=0.625*x

    100/0.625=x

    160=x

    x=160

    now we have:

    64 is 40% 160

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