-30.14% is the change from 491 to 343
Calculation steps:
[( 343 - 491 ) ÷ 491] x 100 = -30.14%
Formula
Percentage change = [(343 - 491) / 491] x 100
Subtract the new number by the original number
343 - 491 = -148
-148 ÷ 491 = -0.3014256619144603
-0.3014256619144603 x 100 = -30.14%