what is the net realizable value in a percentage if the accounts receivable is 1

what is the net realizable value in a percentage if the accounts receivable is 12,444,000 and the less allowance for collectible accounts is 1,681,640. When they calculated the accounts receivable at 1,056,000 and the less allowance for collectible accounts at 23,000 it was 98% in net realizable value wondering how do you get that in percentages