Decimals

Let’s play a game called target number. Here’s how it works: I give you a target number and starting number and you tell me what I need to get there.

For example, our target number is $0.4$0.4, and if I tell you the number $0.2$0.2 you would say $2$2, because $0.2\times2=0.4$0.2×2=0.4.

Find the missing number below if $0.3$0.3 is our target number.

$0.1\times\editable{}=0.3$0.1×=0.3

Easy

Less than a minute

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