Javascript that calculates a percentage

I am working in a PDF Form and trying to do this calculation.

I understand that I need to do it in javascript, which I have never done. Any help is appreciated.

Total Services Costs x .9 = Total Services Costs 2

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Correct answer try67

You can use this code as the custom calculation script of the second field:

event.value = Number(this.getField("Total Services Costs").valueAsString) * 0.9;

Correct answer

Community Expert

You can use this code as the custom calculation script of the second field:

event.value = Number(this.getField("Total Services Costs").valueAsString) * 0.9;

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