217.21% is the change from 308 to 977
Calculation steps:
[( 977 - 308 ) ÷ 308] x 100 = 217.21%
Formula
Percentage change = [(977 - 308) / 308] x 100
Subtract the new number by the original number
977 - 308 = 669
669 ÷ 308 = 2.1720779220779223
2.1720779220779223 x 100 = 217.21%