-1.86% is the change from 429 to 421
Calculation steps:
[( 421 - 429 ) ÷ 429] x 100 = -1.86%
Formula
Percentage change = [(421 - 429) / 429] x 100
Subtract the new number by the original number
421 - 429 = -8
-8 ÷ 429 = -0.018648018648018648
-0.018648018648018648 x 100 = -1.86%