221.75% is the change from 308 to 991
Calculation steps:
[( 991 - 308 ) ÷ 308] x 100 = 221.75%
Formula
Percentage change = [(991 - 308) / 308] x 100
Subtract the new number by the original number
991 - 308 = 683
683 ÷ 308 = 2.2175324675324677
2.2175324675324677 x 100 = 221.75%