August 8 is Day 15 and falls under the 1% discount rule.
750/0.99 = 757.58 from the balance, and 1400.00 - 757.58 = 642.42 is due by day 60.
Since you didn’t put the numbers to find the amount, I’ll teach you how to.. Once you have the decimal figure, multiply it by the number for which you seek to calculate the percentage
The answer is 2900mg because you have to divide the two numders
The last one is rational because it is a terminating decimal.