The school spent 1.2 million yuan to build a teaching building, which was 300,000 yuan less than the original plan. What percentage of the original plan was the actual cost?
学校建教学楼花费120万元，比原来计划节约30万元，实际花费是原计划的百分之几？
<gadget id="calculator">120 + 30</gadget>
<output>150</output>

<gadget id="calculator">120 / 150</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>