Question 768140
After {{{ 1/4 }}} hr, 
{{{ 1/8 }}} gallon leaks out
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Now double the amount of time
After {{{ 1/4 + 1/4 = 1/2 }}} hr
{{{ 1/8 + 1/8 = 1/4 }}} gallons has leaked out
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After {{{ 1/4 + 1/4 + 1/4 = 3/4 }}} hr
{{{ 1/8 + 1/8 + 1/8 = 3/8 }}} gallons has leaked out
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After {{{ 1/4 + 1/4 + 1/4 + 1/4 = 1 }}} hr
{{{ 1/8 + 1/8 + 1/8 + 1/8 = 1/2 }}} gallons has leaked out
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Use this last part to lay out the 1/4's and the 1/8's on
the number line to give you 1/2 gallon leaking out in 1 hr