209.24% is the change from 249 to 770
Calculation steps:
[( 770 - 249 ) ÷ 249] x 100 = 209.24%
Formula
Percentage change = [(770 - 249) / 249] x 100
Subtract the new number by the original number
770 - 249 = 521
521 ÷ 249 = 2.0923694779116464
2.0923694779116464 x 100 = 209.24%