how do i make addition of two fields in ssrs expression?

I have generated one ssrs report

now i have two fields having values

1st f开发者_如何学Pythonield value is =Fields!FirstNO.Value

2nd field value is =Fields!SecondNO.Value

now i have one field average and i need to write expression like

average = (Fields!FirstNO.Value+Fields!SecondNO.Value) / (Fields!SecondNO.Value)

how can i write above in expression?? directly as i shown or any other syntax is there please help?

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Are you sure these fields are numeric? Maybe try convert to numeric, like =cint(Fields!FirstNO.Value)