121.22% is the change from 278 to 615
Calculation steps:
[( 615 - 278 ) ÷ 278] x 100 = 121.22%
Formula
Percentage change = [(615 - 278) / 278] x 100
Subtract the new number by the original number
615 - 278 = 337
337 ÷ 278 = 1.2122302158273381
1.2122302158273381 x 100 = 121.22%