Will rate

Janice V. bought a 9% $1000 20-year bond for $900. She received a semiannual dividend for 8 years, then sold it immediately after the sixteenth dividend for $925. What rate of return did she make per semiannual period, and per year (nominal)? The rate of return that she made per semiannual period is The rate of return that she made per year is 453%