How to use percentage in Gauge Chart

I have a table summarizing a tasks child table. I have summaries for "# of tasks"​, "# of active tasks"​, and "# of completed tasks"​.

I made a Report Link to show the Gauge chart of tasks per entry in its own form. But I can't get a formula field to accurately calculate in the Gauge chart. It's calculating 162.5% for some reason when it's supposed to be 4%

Formula Perc Comp: [# of Tasks]/[# of Completed Tasks]/100

Gauge chart settings:
(Formula Perc Comp) Summarized by: summed
Start at 0
Goal is 1

How do I make the gauge chart show correctly show the entry's completed tasks percentage?

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Alexandria Lewis
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