Yucai Primary School has 150 computers this year, an increase of 75 compared to last year. What percentage is the increase this year compared to last year?
育才小学今年拥有电脑150台，比去年增加了75台，今年比去年增加了百分之几？
<gadget id="calculator">150 - 75</gadget>
<output>75</output>

<gadget id="calculator">75 / 75</gadget>
<output>1</output>

<result>1</result>