To find the percentage change from 100 to 175, we need to first calculate the difference between the two numbers.

Step 1: Difference = Final Value - Initial Value

Difference = 175 - 100

Difference = 75

Step 2: Next, we need to find the absolute value of the difference. This is because percentage change is always calculated as a positive value.

Absolute Difference = |Difference|

Absolute Difference = |75|

Absolute Difference = 75

Step 3: Now, we can calculate the percentage change using the formula:

Percentage Change = (Absolute Difference / Initial Value) x 100

Percentage Change = (75 / 100) x 100

Percentage Change = 75%

Therefore, the percentage change from 100 to 175 is 75%. This means that there was an increase of 75% from 100 to 175.