Dudu is a fat kid. After exercising, his weight dropped to 60 kilograms, which is 15 kilograms less than last year. How much did his weight drop?
嘟嘟是个胖小孩，经过锻炼，体重下降到60千克，比去年减少15千克，他的体重下降了百分之几？
<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<gadget id="calculator">15 / 75</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>