82.33% is the change from 215 to 392
Calculation steps:
[( 392 - 215 ) ÷ 215] x 100 = 82.33%
Formula
Percentage change = [(392 - 215) / 215] x 100
Subtract the new number by the original number
392 - 215 = 177
177 ÷ 215 = 0.8232558139534883
0.8232558139534883 x 100 = 82.33%