A fraction minus 9 fractional units is 0.5, plus 1 fractional unit is 1. What is the original score.
一个分数减9个分数单位后得0.5，加上1个分数单位后是1．原来这个分数是多少．
<gadget id="calculator">19 / 20</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>