Sample Problems on Percent Decrease Formula

Question 1: What is the percentage decrease from 12000 to 11600?

Solution:

Given:

The old value is 12000.

The new value is 11600

⇒ Percentage decrease = (12000 – 11600/12000) × 100

⇒ Percentage decrease = 3.33%

Hence, the percentage decrease is 3.33%.

Question 2: What is the percentage decrease from 120 to 96?

Solution:

Given:

The old value is 120.

The new value is 96

Percentage decrease =  × 100

⇒ Percentage decrease = (120 – 96/120)  × 100

⇒ Percentage decrease = 20%

Hence, the percentage decrease is 20%.

Question 3: What is the percentage decrease from 50 to 10?

Solution:

Given:

The old value is 50.

The new value is 10

Percentage decrease =  × 100

⇒ Percentage decrease = (50 – 10/50) × 100

⇒ Percentage decrease = 80%

Hence, the percentage decrease is 80%.

Question 4: What is the percentage decrease from 20 to 18?

Solution:

Given:

The old value is 20.

The new value is 18

Percentage decrease =  × 100

⇒ Percentage decrease = (20 – 18/20) × 100

⇒ Percentage decrease = 10%

Hence, the percentage decrease is 10%.

Question 5: What is the percentage decrease from100 and 50?

Solution:

Given:

The old value is 100.

The new value is 50

We have,

Percentage decrease =  × 100

⇒ Percentage decrease = (100 – 50/100) × 100

⇒ Percentage decrease = 50%

Hence, the percentage decrease is 50%.

Question 6: What is the percentage decrease from 2000 to 1600?

Solution:

Given:

The old value is 2000.

The new value is 1600

Percentage decrease =  × 100

⇒ Percentage decrease = (2000 -1600/2000) × 100

⇒ Percentage decrease = 20%

Hence, the percentage decrease is 20%.

Question 7: What is the percentage decrease from 100 to 160?

Solution:

Given:

The old value is 100.

The new value is 160

Percentage decrease =× 100

⇒ Percentage decrease =(160 – 100/100) × 100

⇒ Percentage decrease =60%

Hence, the percentage decrease is 60%.

Question 8: What is the percentage decrease from 600 to 400?

Solution:

Given:

The old value is 600.

The new value is 400.

Percentage decrease = × 100

⇒ (Percentage decrease = 600 – 400/400) × 100

⇒ Percentage decrease = 50%

Hence, the percentage decrease is 50%.

Percent Decrease means to the percentage change in the value when it is decreased over a certain period of time. For example, decrease in rainfall, decrease of temperature in winter are few examples of Percent Decrease.

Percentage in mathematics is studied as the ratio or a number that is expressed as a fraction of 100. It is generally denoted by the symbol (%) and has no units. A percentage is a pure number that is taken as a proportion of the whole part. It can be simply calculated by dividing the number by whole part or portion and multiplying by 100.

Let’s know more about Percent Decrease Formula in detail below.