Not very surprising

Today I did something that was not very surprising. If you're very old or if you're very young you will think it is surprising.  Other wise it is not very surprising. I rode my bike 100 times around a small circle. First I did 15 laps and planned to have a pit stop. Then I did more laps I was at 25 but I had to stop and rest. Then I did some more laps then I did 41 then rested to eat. After that I did 25 more laps and did 66. Later I decided to get up to 100 laps in two more rounds guess how may laps I did after the next one and you know the last one is 100. High light the black to see the answer. 66 to 81 then 81 to 100. Have fun!