-47.12% is the change from 660 to 349
Calculation steps:
[( 349 - 660 ) ÷ 660] x 100 = -47.12%
Formula
Percentage change = [(349 - 660) / 660] x 100
Subtract the new number by the original number
349 - 660 = -311
-311 ÷ 660 = -0.4712121212121212
-0.4712121212121212 x 100 = -47.12%