To calculate percentage increase, you'd subtract the original value from the new value. Then, divide the result by the original value and multiply by 100 to get the percentage. For example, if you went from 50 to 60, subtract 50 from 60 to get 10, then divide by 50 and multiply by 100 for a 20% increase. Is there a specific situation where you're looking to calculate a percentage increase? Maybe I can help with that!