79.49% is the change from 273 to 490
Calculation steps:
[( 490 - 273 ) ÷ 273] x 100 = 79.49%
Formula
Percentage change = [(490 - 273) / 273] x 100
Subtract the new number by the original number
490 - 273 = 217
217 ÷ 273 = 0.7948717948717948
0.7948717948717948 x 100 = 79.49%