JavaScript: Calculate the percentage of a number

JavaScript Math: Exercise-32 with Solution

Calculate Percentage of a Number

Write a JavaScript function to calculate the percentage (%) of a number.

Test Data:
console.log(percentage(1000, 47.12));
471.2

Sample Solution:

JavaScript Code:

// Define a function named percentage that calculates the percentage of a given number.
function percentage(num, per)
{
  // Multiply num by per divided by 100 to find the percentage.
  return (num/100)*per;
}
          
// Output the result of calculating 47.12% of 1000 to the console.
console.log(percentage(1000, 47.12));

Output:

471.2

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-32 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that calculates the percentage of one number relative to another and formats the result as a percentage.
• Write a JavaScript function that computes what percentage one value is of another using division and multiplication.
• Write a JavaScript function that handles division by zero when calculating percentage and returns a default value.
• Write a JavaScript function that calculates and rounds the percentage of a number to two decimal places.

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