There are 240 students in the fourth grade of Yuying Primary School, and the ratio of boys to girls is 7:8. How many fewer boys than girls?
育英小学四年级有240人，男生和女生人数比是7：8．男生比女生少几人？
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">240 * (8/15)</gadget>
<output>128</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">240 * (7/15)</gadget>
<output>112</output>

<gadget id="calculator">128 - 112</gadget>
<output>16</output>

<result>16</result>