-69.88% is the change from 840 to 253
Calculation steps:
[( 253 - 840 ) ÷ 840] x 100 = -69.88%
Formula
Percentage change = [(253 - 840) / 840] x 100
Subtract the new number by the original number
253 - 840 = -587
-587 ÷ 840 = -0.6988095238095238
-0.6988095238095238 x 100 = -69.88%