Hi @Channah ,
Could you please show more details about the issue that you mentioned?
Do you want to remove the decimal places from the Calculation result?
Based on the needs that you mentioned, I think the Round function could achieve your needs. Please consider set the Default property of the Text Input Box to following:
Round(
(DataCardValue137.Selected.Value + DataCardValue138.Selected.Value + DataCardValue139.Selected.Value) / 15 * 100,
0
)
Note: The Round function is required to provide two arguments value. Please check the following article for more details:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-round#syntax
If you want to remain two decimals within the Text Input box for your calculation result, please modify above formula as below:
Round(
(DataCardValue137.Selected.Value + DataCardValue138.Selected.Value + DataCardValue139.Selected.Value) / 15 * 100,
2
)
Please take a try with above solution, check if the issue is solved.
Best regards,