-70.08% is the change from 859 to 257
Calculation steps:
[( 257 - 859 ) ÷ 859] x 100 = -70.08%
Formula
Percentage change = [(257 - 859) / 859] x 100
Subtract the new number by the original number
257 - 859 = -602
-602 ÷ 859 = -0.7008149010477299
-0.7008149010477299 x 100 = -70.08%