-77.99% is the change from 686 to 151
Calculation steps:
[( 151 - 686 ) ÷ 686] x 100 = -77.99%
Formula
Percentage change = [(151 - 686) / 686] x 100
Subtract the new number by the original number
151 - 686 = -535
-535 ÷ 686 = -0.7798833819241983
-0.7798833819241983 x 100 = -77.99%