-80.89% is the change from 157 to 30
Calculation steps:
[( 30 - 157 ) ÷ 157] x 100 = -80.89%
Formula
Percentage change = [(30 - 157) / 157] x 100
Subtract the new number by the original number
30 - 157 = -127
-127 ÷ 157 = -0.8089171974522293
-0.8089171974522293 x 100 = -80.89%