90% of the students in Class 5•1 subscribed to the "Juvenile Intellectual Development News". "Primary Mathematics", how many students in the class do not book
五•一班有90%的同学订阅《少年智力开发报．小学数学》，没有订的同学占全班同学的多少
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>