In a subtraction formula, the sum of the minuend, the subtrahend and the difference is 75.2, and the subtrahend is 15.2 larger than the difference, what is the difference?
一道减法算式中，被减数、减数及差相加的和是75.2，且减数比差大15.2，则差是多少．
<gadget id="calculator">75.2 / 2</gadget>
<output>37.6</output>

<gadget id="calculator">37.6 - 15.2</gadget>
<output>22.4</output>

<gadget id="calculator">22.4 / 2</gadget>
<output>11.2</output>

<result>11.2</result>