Respuesta :
Answer:
90/x = 70/100
Step-by-step explanation:
Replace "is" by "=".
Replace "of" by "×".
Then you have ...
... 90 = 70% × x
70% can be writtten any of several ways, including 70/100 or 0.70 or 0.7.
If you divide this equation by x, you get ...
... 90/x = 70/100