Respuesta :

X. = 15
30. 100
100x= 450
X=4.5 so that is right

X. 35
30. 100
100x= 1050
X=10.5 so that is right

X. 35
10. 100

100x=350
X=3.5 so that is correct

X. 45
175. 100
7875=100x
X=78.75 and that is correct

You did everything correctly! :)