Einen Prozentsatz einer ganzen Zahl finden

In dieser Lektion lernen wir, wie man den Prozentsatz einer ganzen Zahl ermittelt.

Das Finden des Prozentsatzes einer ganzen Zahl ist im Grunde ein Multiplikationsproblem.

Es ist ein Produkt aus dem Prozentsatz und der ganzen Zahl. Der Prozentsatz wird als Dezimalzahl geschrieben und mit der ganzen Zahl multipliziert, um den Prozentsatz der ganzen Zahl zu erhalten.

Rules to find the percentage of a whole number

  • The percentage of a whole number is written as a product of the percentage and the whole number. For example: 60% of 98 is written as 60% × 98

  • The percentage then is written as a decimal. To do this, the decimal point is shifted two places to the left and the percent sign is dropped

    For example: 60% × 98 = 60.0% × 98 = 0.60 × 98

  • The multiplication of the decimal and the whole number is carried out and product finally gives the percentage of the whole number

    For example: 0.60 × 98 = 58.80

Formula

x% of y where x is any number and y is a whole number

x% of y = x% × y = 0.0x × y

What is 15% of 90?

Solution

Step 1:

15% of 90 = 15% × 90 = 15.0% × 90

Step 2:

To convert the percentage to a decimal, the decimal is shifted two places to left.

15.0% × 90 = 0.15 × 90

Step 3:

0.15 × 90 = 13.50

So, 15% of 90 = 13.50

What is 25% of 72?

Solution

Step 1:

25% of 72 = 25% × 72 = 25.0% × 72

Step 2:

To convert the percentage to a decimal, the decimal is shifted two places to left.

25.0% × 72 = 0.25 × 72

Step 3:

0.25 × 72 = 18.00

So, 25% of 72 = 18.00 = 18

What is 150% of 21?

Solution

Step 1:

150% of 21 = 150% × 21 = 150.0% × 21

Step 2:

To convert the percentage to a decimal, the decimal is shifted two places to left.

150.0% × 21 = 1.50 × 21

Step 3:

1.50 × 21 = 31.50

So, 150% of 21 = 31.50