Question 1155780
Let {{{ x }}} = number of goals Caribou scored 
in the 1st half
{{{ x + 3 }}} = number of goals Caribou scored total
{{{ 3 }}} = total score for D.D.
{{{ ( x + 3 )/ ( x + 6 ) = .9 }}}
{{{ x + 3 = .9*( x + 6 ) }}}
{{{ x + 3 = .9x + 5.4 }}}
{{{ .1x + 3 = 5.4 }}}
{{{ .1x = 2.4 }}}
{{{ x = 24 }}}
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check:
{{{ ( 24 + 3 ) / ( 24 + 6 ) = .9 }}}
{{{ 27 / 30 = .9 }}}
{{{ 27 = 27 }}}
OK
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In the 2nd half:
{{{ ( 3 + 3 ) / ( 24 + 6 ) = 6 / 30 }}}
{{{ 6/30 = 1/5 }}}
{{{ 1/5 = .2 }}}
20% of the goals were scored in the 2nd half
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Get a 2nd opinion if needed