The difference between the two numbers is 15.4 if the subtrahend remains the same. The minuend is reduced by 0.9, what is the difference?
两个数的差是15.4，如果减数不变．被减数减少0.9，差是多少．
<gadget id="calculator">15.4 - 0.9</gadget>
<output>14.5</output>

<result>14.5</result>