623.7% is the change from 135 to 977
Calculation steps:
[( 977 - 135 ) ÷ 135] x 100 = 623.7%
Formula
Percentage change = [(977 - 135) / 135] x 100
Subtract the new number by the original number
977 - 135 = 842
842 ÷ 135 = 6.237037037037037
6.237037037037037 x 100 = 623.7%