Flo-Jo’s intermediate times during her 21.34 were 11.18 and 16.10. At 100m, she was leading Ottey by only 0.01. The reason was that Flo-Jo ran a very conservative bend. She should have been several meters ahead (she ran 10.62 at 100m legal wind in Seoul vs 11.03 for Ottey).
Flo-Jo’s 100-150m section (including approx 15m in bend) was 4.92, so adding this to 10.62 gives 15.54, which is the least she was able to run at 150m. I actually think she could run around 15.40 FAT, as she demonstrated an oustanding speed maintenance (0.91 for 10.54w and 0.92 during 10.61 and 10.62 races) during the 60-90m section of 100m races).