Answer:
70 members
Explanation:
Let's call the number of total members x. We know that 30% or
of the members forgot, so our equation looks like this:

Then, we will multiply both sides by 10 to get rid of the fraction:
3x = 210
Finally, we will divide both sides by 3 to find out our variable, x:
x = 70
So, there are 70 members in total.
Hope this helped!