Answer:
37%
Step-by-step explanation:
If Ramona received an overall pay of $52,561 last year, $23,960 of which was base pay, we can first subtract these two numbers to find the amount she made from her sales commission: 
$52,561 - $23,960 = $28,601
In order to find her percent commission, we can set up a proportion: 
 , where 'p' is her rate of commission
, where 'p' is her rate of commission
Cross-multiply and divide:  100(28601) = 77300x or 2,860,100 = 77,300x 
Or x = 37%