Percentage Calculator: What is 90 percent of 20.? = 18

90 percent *20. =

(90:100)*20. =

(90*20.):100 =

1800:100 = 18

Now we have: 90 percent of 20. = 18

Question: What is 90 percent of 20.?

Percentage solution with steps:

Step 1: Our output value is 20..

Step 2: We represent the unknown value with {x}.

Step 3: From step 1 above,{20.}={100\%}.

Step 4: Similarly, {x}={90\%}.

Step 5: This results in a pair of simple equations:

{20.}={100\%}(1).

{x}={90\%}(2).

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have

\frac{20.}{x}=\frac{100\%}{90\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{20.}=\frac{90}{100}

\Rightarrow{x} = {18}

Therefore, {90\%} of {20.} is {18}

Percentage of

Difference

20. percent *90 =

(20.:100)*90 =

(20.*90):100 =

1800:100 = 18

Now we have: 20. percent of 90 = 18

Question: What is 20. percent of 90?

Percentage solution with steps:

Step 1: Our output value is 90.

Step 2: We represent the unknown value with {x}.

Step 3: From step 1 above,{90}={100\%}.

Step 4: Similarly, {x}={20.\%}.

Step 5: This results in a pair of simple equations:

{90}={100\%}(1).

{x}={20.\%}(2).

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have

\frac{90}{x}=\frac{100\%}{20.\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{90}=\frac{20.}{100}

\Rightarrow{x} = {18}

Therefore, {20.\%} of {90} is {18}

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