Answer
9.9
Work Step by Step
Move decimal of divisor and dividend to make divisor a whole number.
$2.\underset{\smile}{2}\ )\overline{21.\underset{\smile}{7}8}$
$\ \ \ \ \ \ \ \ \ 9.9$
$22)\overline{217.8}$
$\ \ \ \ \ \ \underline{198}$
$\ \ \ \ \ \ \ \ 198$
$\ \ \ \ \ \ \ \ \underline{198}$
$\ \ \ \ \ \ \ \ \ \ \ \ 0$
Estimate using front end rounding.
$20\div2=10\checkmark$
