Respuesta :

AprilKitties
0.9 of 20:

You could also think of 0.9 as 9/10.

9/10, if you multiply by 2/2, is 18/20.

So therefore, you would then know that it would be 18, because 20 was the whole number, so what over 20 is equal to 9/10? 18.

A simpler method is just to multiply. 0.9 * 20 = 18.
0.9 out if 29 is 18, as if you think of it as 9/10 then double it, it would be 18/20. Hope this helps!