Respuesta :
No, it's not equivalent because if 4×9=36 then You have to do 9×9 but 9×9 is 81 so no.
I'm not sure what you mean by "tape diagram" but you can use a proportion to check. Assume that 4/9 is equal to 36/72 for now. We'll use cross multiplication to show that it's actually false.
4/9 = 36/72
4*72 = 9*36 ... cross multiply
288 = 324 ... this is false
The last equation is false because we get two different values on either side, so the first equation must be false
So 4:9 is not the same as 36:72
