A company produces an ROE of 16% this year with Profits after Taxes of $100,000,000. Is it possible for the company to earn more than $1 million next year yet produce an ROE below 16%?

Yes, if it pays more dividends from the $1 million next year than it does this year.
Yes, if the tax rate is higher next year.
Yes, if the percentage increase in owners' equity next year compared to this year exceeds the percentage increase in profits.
Of course not! What do you think I am - a fool?!!