A bottle of water can fill 10 bowls or 12 cups. If 4 cups of water and 2 bowls of water are poured into the same empty bottle, then the height of the water level accounts for ((())/(())) of the height of the bottle.
一瓶水可装满10碗或12杯，如果倒入4杯水和2碗水在同样的空瓶子内，这时水面高度占瓶子高度的((())/(()))．
<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>