-70.27% is the change from 915 to 272
Calculation steps:
[( 272 - 915 ) ÷ 915] x 100 = -70.27%
Formula
Percentage change = [(272 - 915) / 915] x 100
Subtract the new number by the original number
272 - 915 = -643
-643 ÷ 915 = -0.7027322404371584
-0.7027322404371584 x 100 = -70.27%