-89.3% is the change from 841 to 90
Calculation steps:
[( 90 - 841 ) ÷ 841] x 100 = -89.3%
Formula
Percentage change = [(90 - 841) / 841] x 100
Subtract the new number by the original number
90 - 841 = -751
-751 ÷ 841 = -0.8929845422116528
-0.8929845422116528 x 100 = -89.3%