Question 939620
You are paying for the milk and not the water, so
there is {{{ 15/16.5 }}} as much milk as before
{{{ ( 16.5 - 15 ) / 16.5 = 1.5/16.5 }}} is the fraction
of water to make up the difference
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The ratio of milk to water is {{{ 15/1.5 = 10/1 }}}
Hope I got it