Question 1024978
$1.70 is actually 1.7 dollars
In terms of units:
[ number of dollars ] x [ dimes/dollar ] = [ number of dimes ]
{{{ 1.7*( 10 / 1 ) = 17 }}}
So, there are 17 dimes in a dollar
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Note that dollars cancel on the left side,
leaving you with dimes
I use this cancelling of units often to get 
the units of my answer