Answer:
$2500.
Explanation:
Let x be represent the amount contributed by Rachael's to her 401(k) plan.
We have been given that Rachael’s employer matches 16% of Rachel’s contribution to her 401(k) plan. Rachael's employer contributed $400 to the plan a year.
We need to find x such that 16% of x is $400.




Therefore, Rachael contributed $2500 to the plan last year.