-76.6% is the change from 312 to 73
Calculation steps:
[( 73 - 312 ) ÷ 312] x 100 = -76.6%
Formula
Percentage change = [(73 - 312) / 312] x 100
Subtract the new number by the original number
73 - 312 = -239
-239 ÷ 312 = -0.7660256410256411
-0.7660256410256411 x 100 = -76.6%