In a popular singing competition, Miaomiao's average score was 9.30, and Huihui's average score was 8.90 yuan. What is the difference between the two average scores?
在一次唱红歌比赛中，苗苗的平均得分9.30分，慧慧的平均得分8.90元，两人平均得分相差多少分．
<gadget id="calculator">9.3 - 8.9</gadget>
<output>0.4</output>

<result>0.4</result>