-14.13% is the change from 991 to 851
Calculation steps:
[( 851 - 991 ) ÷ 991] x 100 = -14.13%
Formula
Percentage change = [(851 - 991) / 991] x 100
Subtract the new number by the original number
851 - 991 = -140
-140 ÷ 991 = -0.14127144298688193
-0.14127144298688193 x 100 = -14.13%