This guide explains how to calculate percentage change between two numbers. It provides a step-by-step guide with a relatable scenario to help readers understand the concept.

Calculating percentage increase between two numbers is straightforward.

**To calculate the percentage change between two numbers**, find the difference between the final and initial number. This difference represents the **increase (if positive)** or **decrease (if negative)**. Now, divide that difference by the starting number and multiply by 100 to express the change as a percentage relative to the starting point.

For instance, if your salary went from $2000 to $2400, you experienced a 20% increase (2400-2000)/2000)*100 = 20%. Conversely, if the price of a shirt dropped from $50 to $40, there’s a 20% decrease ((40-50)/50)*100 = -20%).

**Let’s understand it step by step with a relatable scenario:**

Imagine you’re tracking your budget and want to see how your grocery bill has changed. Here’s how to calculate the percentage increase or decrease:

**Find the difference:**Subtract the original amount (starting point) from the current amount (ending point). A positive result means an increase, while a negative result means a decrease.**Relate it to the starting point:**Divide the difference you just found by the original amount (starting point) and multiply by 100. This expresses the change as a percentage relative to what you started with.

For example, if your grocery bill went from $100 last month to $120 this month, that’s a difference of $120 – $100 = $20. To find the percentage increase, divide $20 by $100 (original amount) and multiply by 100, resulting in a 20% increase.

Conversely, if your phone bill went down from $50 to $40, the difference is -$10 (negative because it’s a decrease). Divide -$10 by $50 (original amount) and multiply by 100 to get -20%, indicating a 20% decrease.

Check out helpful percentage calculators: Calculators, Percentage Calculator