Jimwell spent four-tenths of $20. What fractional part of $20 was left? Write the answer in decimal form.(1 point)

Jimwell spent 4/10 of $20, which is equal to $20 * (4/10) = $<<20*(4/10)=8>>8.

So, $20 - $8 = $<<20-8=12>>12 is left.
The fractional part of $20 that was left is 12/20 = 3/5.
In decimal form, this is equal to 0.6. Answer: \boxed{0.6}.