$\"\"$

1 mile = 1.61 kilometers

1 kilometer = $\"\"$ mile

$\"\"$ = $\"\"$

$\"\"$

$\"\"$ = $\"\"$ × $\"\"$ \ \ Cancel out common unit kilometer

$\"\"$ = $\"\"$

$\"\"$

Simplify $\"\"$

$\"\"$ = $\"\"$

$\"\"$

$\"\"$ = $\"\"$