-66.98% is the change from 421 to 139
Calculation steps:
[( 139 - 421 ) ÷ 421] x 100 = -66.98%
Formula
Percentage change = [(139 - 421) / 421] x 100
Subtract the new number by the original number
139 - 421 = -282
-282 ÷ 421 = -0.669833729216152
-0.669833729216152 x 100 = -66.98%