Percentage Calculator: What is 90 percent of 4.20? = 3.78

90 percent *4.20 =

(90:100)*4.20 =

(90*4.20):100 =

378:100 = 3.78

Now we have: 90 percent of 4.20 = 3.78

Question: What is 90 percent of 4.20?

Percentage solution with steps:

Step 1: Our output value is 4.20.

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

Step 3: From step 1 above,{4.20}={100\%}.

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

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

{4.20}={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{4.20}{x}=\frac{100\%}{90\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{4.20}=\frac{90}{100}

\Rightarrow{x} = {3.78}

Therefore, {90\%} of {4.20} is {3.78}

Percentage of

Difference

4.20 percent *90 =

(4.20:100)*90 =

(4.20*90):100 =

378:100 = 3.78

Now we have: 4.20 percent of 90 = 3.78

Question: What is 4.20 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}={4.20\%}.

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

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

{x}={4.20\%}(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\%}{4.20\%}

Step 7: Again, the reciprocal of both sides gives

\frac{x}{90}=\frac{4.20}{100}

\Rightarrow{x} = {3.78}

Therefore, {4.20\%} of {90} is {3.78}

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