A number changes from 50 to 76. What type of percent change is this? Calculate the percent change.

50 is the old value and 76 is the new value. In this case we have a positive change (increase) of 52 percent because the new value is greater than the old value.

This is a positive increase

You need to find the difference between 50 and 76 which is 26.
Then you do 26/50 which is 0.52. Multiply 0.52 by 100 and that leaves you with 52.

The percentage increase is 52%.

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Horizontal change or the change of x