If 2,484 union members represent 90% of a factory's work force how many workers are employed?

I used this formula r*b=a, so 90 is my rate; base is unknown and 2,484 is the amount. I divided 90 into 2,484 and came up with 276, but I know this cant be right. The answer is 2,760 I don't know how i missed my zero, I thought I set everything up right but I still got 276. Please help me,line up my problem correctly. website/explanation
thank you.

1 answer

0.9x = 2484

x = 2484/0.9

x = 2,760