But that slave went out and found one of his fellow slaves, who owed him 100 denarii,a and he laid hold on him, and seizing him, began to choke him, saying, ‘Pay what you owe.’ Bible see other translations
A denarius was a coin that was one day’s wage for a laborer.

“100 denarii” This equals 100 days’ wages, which, by the figures given for Matt. 18:24 above, would be $6,400. Not a small sum, but infinitesimal compared to the 10,000 talents. Jesus made an important point in his parable. Notice that he did not act as if the slave was owed nothing by his fellow slave. When people sin against us it hurts, sometimes very deeply. Jesus knows that and used the figure of 100 denarii to demonstrate that the debt we feel that is created by the sin of others is very real. Nevertheless, if we keep in mind how much we have been forgiven for, we can forgive it.

Commentary for: Matthew 18:28