77.7% is the change from 278 to 494
Calculation steps:
[( 494 - 278 ) ÷ 278] x 100 = 77.7%
Formula
Percentage change = [(494 - 278) / 278] x 100
Subtract the new number by the original number
494 - 278 = 216
216 ÷ 278 = 0.7769784172661871
0.7769784172661871 x 100 = 77.7%