When do dc's learn about percentages typically?

[DidEinsteinsMum]

Ok ds came out with a corker of an excus the other night for not going to bed

"I am only 80% tired so i am not tired enough to go to sleep yet so i cant go to bed"

10/10 for originality but it left me wondering where he might have picked up either a phrase or the concept of percentages. He is bright but i have no idea where he got this from.

SO the question is when do they generally learn about percentages? Is this something i should have expected him to have known about

[fluffles]

evidence exists that most adults don't even understand percentages, in my industry we have to accomodate this in our communications

so he's clearly doing very very well

[DidEinsteinsMum]

Yes but he is 4 1/2 how does he know this stuff? I havent taught him it - been very careful not to so where and how and should he know this stuff?

[applepudding]

Perhaps he got it from the TV.

DS has done percentages in school this year - age 7-8.

[plimple]

Are you sure you don't talk about percentages when out shopping? You don't have to sit down and teach kids for them to just learn what is around them.

[DidEinsteinsMum]

Not as far as I am aware. Was wondering is the weird world of numberjacks has heading down this route recently. But havent stayed long enough to find out. Ds is at that age where i can stick cbeebies on and grab 5 mins get on with jobs.

Ahh just thought his favourite program is myth busters they sometimes use perentages. Mystery over then