-85.07% is the change from 991 to 148
Calculation steps:
[( 148 - 991 ) ÷ 991] x 100 = -85.07%
Formula
Percentage change = [(148 - 991) / 991] x 100
Subtract the new number by the original number
148 - 991 = -843
-843 ÷ 991 = -0.8506559031281534
-0.8506559031281534 x 100 = -85.07%