Percentage Calculator: What is 21 percent of 20.? = 4.2

21 percent *20. =

(21:100)*20. =

(21*20.):100 =

420:100 = 4.2

Now we have: 21 percent of 20. = 4.2

Question: What is 21 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}={21\%}.

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

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

{x}={21\%}(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\%}{21\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{20.}=\frac{21}{100}

\Rightarrow{x} = {4.2}

Therefore, {21\%} of {20.} is {4.2}

Percentage of

Difference

20. percent *21 =

(20.:100)*21 =

(20.*21):100 =

420:100 = 4.2

Now we have: 20. percent of 21 = 4.2

Question: What is 20. percent of 21?

Percentage solution with steps:

Step 1: Our output value is 21.

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

Step 3: From step 1 above,{21}={100\%}.

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

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

{21}={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{21}{x}=\frac{100\%}{20.\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{21}=\frac{20.}{100}

\Rightarrow{x} = {4.2}

Therefore, {20.\%} of {21} is {4.2}

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