1103.61% is the change from 83 to 999
Calculation steps:
[( 999 - 83 ) ÷ 83] x 100 = 1103.61%
Formula
Percentage change = [(999 - 83) / 83] x 100
Subtract the new number by the original number
999 - 83 = 916
916 ÷ 83 = 11.036144578313253
11.036144578313253 x 100 = 1103.61%