-83.98% is the change from 493 to 79
Calculation steps:
[( 79 - 493 ) ÷ 493] x 100 = -83.98%
Formula
Percentage change = [(79 - 493) / 493] x 100
Subtract the new number by the original number
79 - 493 = -414
-414 ÷ 493 = -0.8397565922920892
-0.8397565922920892 x 100 = -83.98%