The minuend is 156, the ratio of the subtrahend to the difference is 7:5, what is the subtrahend.
被减数是156，减数与差的比是7：5，减数是多少．
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">156 * (7/12)</gadget>
<output>91</output>

<result>91</result>