246.24% is the change from 266 to 921
Calculation steps:
[( 921 - 266 ) ÷ 266] x 100 = 246.24%
Formula
Percentage change = [(921 - 266) / 266] x 100
Subtract the new number by the original number
921 - 266 = 655
655 ÷ 266 = 2.462406015037594
2.462406015037594 x 100 = 246.24%