The sum of the numerator and denominator of a fraction is 25. If 1 is subtracted from the numerator, the fraction is equal to 2. What is the original number?
一个分数的分子和分母的和是25，如果分子减去1，那么这个分数就等于2，原数是多少？
<gadget id="calculator">2 * 25</gadget>
<output>50</output>

<gadget id="calculator">1 + 50</gadget>
<output>51</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">51 / 3</gadget>
<output>17</output>

<gadget id="calculator">25 - 17</gadget>
<output>8</output>

<gadget id="calculator">51 / 3 / 8</gadget>
<output>17/8 = around 2.125</output>

<result>17/8 = around 2.125</result>