For a project, the actual cost is 89.5% of the plan, which is much less than the plan.
一项工程，实际造价是计划的89.5%，比计划节约了多少．
<gadget id="calculator">89.5 / 100</gadget>
<output>0.895</output>

<gadget id="calculator">1 - 0.895</gadget>
<output>0.105</output>

<result>0.105</result>