-11.61% is the change from 491 to 434
Calculation steps:
[( 434 - 491 ) ÷ 491] x 100 = -11.61%
Formula
Percentage change = [(434 - 491) / 491] x 100
Subtract the new number by the original number
434 - 491 = -57
-57 ÷ 491 = -0.11608961303462322
-0.11608961303462322 x 100 = -11.61%