The rate of 28,000% per month is extremely big. I believe the correct monthly rate is 2.8% (correct me if I am wrong though). Next time kindly check the given values.
Rate is expressed in a factor of:
(1 + r)^n
where r is the rate and n is the number of months
First we calculate for the rate in a year (1 year = 12 months). We know that the rate must be constant, therefore:
rate in a month = rate in a year
(1 + 0.028)^1 = (1 + r)^(1/12)
r = 0.3929
Therefore there is an increase of about 39.29% in a year.
Then we calculate for the rate in a day (1 month = 30 days). The rate must also be constant, therefore:
rate in a month = rate in a day
(1 + 0.028)^1 = (1 + r)^(30)
r = 9.21 * 10^-4
Therefore there is an increase of about 0.092% per day.