**This online percentage decrease calculator is a powerful mathematical tool that helps determine the amount of reduction between two values, expressed as a percentage of the original value. **

Imagine a retail store that sold **$80,000** worth of merchandise in January but only **$64,000** in February. The percent reduction calculator help determine the exact **percentage drop** in sales, providing valuable insights for business decision-making. In this case, the store experienced a **20% decrease** in sales.

**Key Applications**

**Key applications** of percentage decrease calculations include:

**Financial analysis**and market trends**Scientific research**and data interpretation**Personal goal tracking****Business performance metrics****Population statistics**

## Percentage Decrease Calculator

Original Value | New Value | Calculation | Percentage Decrease |
---|---|---|---|

$500 | $375 | `((500-375)÷500)×100` | 25% |

1000 kg | 850 kg | `((1000-850)÷1000)×100` | 15% |

80 mph | 56 mph | `((80-56)÷80)×100` | 30% |

240 students | 204 students | `((240-204)÷240)×100` | 15% |

$1200 | $900 | `((1200-900)÷1200)×100` | 25% |

$1500 | $1200 | `((1500-1200)÷1500)×100` | 20% |

500 liters | 400 liters | `((500-400)÷500)×100` | 20% |

300 units | 270 units | `((300-270)÷300)×100` | 10% |

75% | 60% | `((75-60)÷75)×100` | 20% |

200 employees | 180 employees | `((200-180)÷200)×100` | 10% |

$2500 | $2000 | `((2500-2000)÷2500)×100` | 20% |

600 miles | 480 miles | `((600-480)÷600)×100` | 20% |

1,000,000 views | 750,000 views | `((1,000,000-750,000)÷1,000,000)×100` | 25% |

50 kg | 45 kg | `((50-45)÷50)×100` | 10% |

$1,800 | $1,440 | `((1800-1440)÷1800)×100` | 20% |

## Percentage Decrease Formula

The **formula** for calculating **percentage decline** is:

**Percentage Decrease = ((Original Value - New Value) ÷ Original Value) × 100**

This formula can be broken down into three essential steps:

- Subtract the new value from the original value.
- Divide the difference by the original value.
- Multiply the result by 100 to convert to a percentage.

If a car’s value depreciated from **$25,000** to **$20,000**, the calculation would be:

**Percentage Decrease = ((25,000 - 20,000) ÷ 25,000) × 100
= (5,000 ÷ 25,000) × 100
= 0.2 × 100
= 20%**

## How do I calculate percent reduction?

Here’s a **step-by-step approach**:

**Identify your values**:- Record your starting (original) value.
- Record your final (new) value.

**Calculate the difference**:- Subtract the new value from the original value.

**Divide by original**:- Take the difference and divide it by the original value.

**Convert to percentage**:- Multiply the result by 100.

A city’s water consumption decreased from **1,200,000 gallons** to **900,000 gallons** after implementing conservation measures.

**Reduction = ((1,200,000 - 900,000) ÷ 1,200,000) × 100
= (300,000 ÷ 1,200,000) × 100
= 0.25 × 100
= 25%**

## How do you decrease 20% of a number?

To decrease a number by **20%**, you can either:

- Calculate
**20% of the number**and subtract it. - Multiply the number by
**0.8**(100% – 20%).

**Method 1**

**Original Number × (20 ÷ 100) = Amount to subtract
Original Number - Amount to subtract = Final Number**

**Method 2**

**Original Number × (1 - 0.20) = Final Number**

### Decreasing 150 by 20%

- Method 1:
- 150 × (20 ÷ 100) = 30 (amount to subtract)
- 150 – 30 = 120 (final answer)

- Method 2:
- 150 × 0.8 = 120 (final answer)

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