-87.3% is the change from 551 to 70
Calculation steps:
[( 70 - 551 ) ÷ 551] x 100 = -87.3%
Formula
Percentage change = [(70 - 551) / 551] x 100
Subtract the new number by the original number
70 - 551 = -481
-481 ÷ 551 = -0.8729582577132486
-0.8729582577132486 x 100 = -87.3%