The price of grapes in a supermarket is 20 yuan per kilogram. Xiaoli bought 5 kilograms of grapes, and the number of kilograms of grapes Xiaojie bought was what Xiaoli bought (3/4). The two pay separately, and Xiaojie pays the cashier a piece of 100 yuan. How much change should the cashier give?
某超市葡萄的售价为每千克20元．小丽买了5千克，小杰买的葡萄的千克数是小丽所买的(3/4)．两人各自付钱，小杰付给收银员一张100元人民币，收银员应找零多少人民币？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 * (3/4)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">20 * (15/4)</gadget>
<output>75</output>

<gadget id="calculator">100 - 75</gadget>
<output>25</output>

<result>25</result>