-3% is the change from 434 to 421
Calculation steps:
[( 421 - 434 ) ÷ 434] x 100 = -3%
Formula
Percentage change = [(421 - 434) / 434] x 100
Subtract the new number by the original number
421 - 434 = -13
-13 ÷ 434 = -0.029953917050691243
-0.029953917050691243 x 100 = -3%