21 is 75% of what amount

2 answers:

6 0

21 is 75% of 28. You already know that to make 100, you need 4 25's. 75 is three 25's. You take 21 and divide it by three to get seven. Then you take your past knowledge and multiply 7 by 4 and get 28.

zysi [14]3 years ago

3 0

In the given question it is required to find an unknown amount from all the details given in the question. It is given that 21 is the 75% of the unknown number.
Let us consider the amount = x
Then we can write the equation as
75x/100 = 21
75x = 21 * 100
75x = 2100
x = 2100/75
= 28
So the correct amount is 28. <span>. I hope to have made the procedure clear for finding the solutions of such problems.</span>

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sashaice [31]

Hello there!

Let me try this one out!

$6 ^{x-6} = \frac{1}{1296}$

We can start by taking log of both sides

$log(6 ^{x-6}) = log( \frac{1}{1296})$

$(x - 6)(log(6)) = log( \frac{1}{1296})$

Since we are solving for x:

$x - 6 = \frac{log(1/1296)}{log(6)}$

I used a calculator to help me solve the right part :)

x - 6 = - 4

Now we can add 6 on both sides

x - 6 + 6 = - 4 + 6

x = 2

I hope this helps! Let me know if you have any questions about the answer.

4 0

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Oksi-84 [34.3K]

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Julli [10]

Answer:

the answer is option A

Step-by-step explanation: