factory now takes 105 minutes to produce a part, which is 15 minutes shorter than before. How much time is saved in producing such a part?
某工厂现在生产一种零件用了105分钟，比原来缩短15分钟，生产这样一个零件节省时间百分之几？
<gadget id="calculator">105 + 15</gadget>
<output>120</output>

<gadget id="calculator">15 / 120</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>