Question 1080034
Do you need a review of decimals and decimal fractions?
If so:
{{{ .3 = 3/10 }}}
{{{ .31 = 31/100 }}}
{{{ .315 = 315/1000 }}}
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{{{ 20.315 }}} = 20 315/1000 
The fraction can be reduced by
dividing top and bottom by {{{ 5 }}}
{{{ 20.315 }}} = 20 63/200