In September, the ratio of the pocket money expenses of father and mother is 8:5. In October, father saves 25% compared with last month, and mother’s expenses are the same as last month. In October, the two share 121 yuan. In September, father’s How much are petty expenses?
九月份爸爸和妈妈的零用钱开支数之比为8：5，十月份爸爸比上个月节约25%，妈妈的开支与上个月相同，十月份两人共用去121元，九月份爸爸的零用开支多少元？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(5/8) + (3/4)</gadget>
<output>11/8 = around 1.375</output>

<gadget id="calculator">121 / (11/8)</gadget>
<output>88</output>

<result>88</result>