You are shopping for a mortgage to buy a home after graduation. Assume a loan amount of $800,000 for 30 years at a nominal annual interest rate of 4%, compounded monthly. You calculate and record the required monthly payment. You are not sure if rates will rise or fall, and desire to examine the implications of rates rising. If the nominal annual interest rate were to rise to 8%, what would be the percentage increase in your monthly payment, relative to the original monthly payment at a nominal annual interest rate of 4%? Please round your numerical answer to the nearest integer.