Hi,
s = "loop_compus"
sample s, finish: 0.75
sleep 8
sample s , finish: 0.75/3
sleep 8
sample s , finish: 3/4
stop
Which line do you think won’t work as expected ?
Cheers
This might not be obvious unless you’re aware of the way Ruby handles division 
In Ruby, if you divide two integer numbers, the result also becomes an integer.
So here, since 3 / 4 is calculated as 0.75 but the numbers involved are both integers, a result of 0 is returned.
To make it return the desired result instead, at least one of the numbers needs to eg. be a float:
3/4.0 will work, as will 3.0/4, or you can use .to_f on one of them, etc.
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yep @ethancrawford i guessed it was about this but try to explain this to 13-14 old pupils good luck. It’s the chance to introduce variable types.