YOu need a gunsmith or call S&W and ask for a owners manual
It uses a permanent filter, KitchenAid Model 449-KCM5GTF.
1% of 449 = 1% * 449 = 0.01 * 449 = 4.49
449% = 449/100 in fraction
449% = 449/100 in fraction
1, 449.
1 x 449
75% of 449 is 336.75
449 x 1
449 * 295 = 132,455
449
449 + 313 = 762
500 out of 449 is 111.36%