10% off of 100 is 90
10% off of 90 is 81
10% off of 81 is 72.9
10% off of 72.9 is 65.61
10% off of 65.61 is 59.049
10% off of 59.049 is 53.149
10% off of 53.149 is 47.8341
10% off of 47.8341 is 43.05
10% off of 43.05 is 38.74569
10% off of 38.74569 is 34.8711