33.87% is the change from 688 to 921
Calculation steps:
[( 921 - 688 ) ÷ 688] x 100 = 33.87%
Formula
Percentage change = [(921 - 688) / 688] x 100
Subtract the new number by the original number
921 - 688 = 233
233 ÷ 688 = 0.3386627906976744
0.3386627906976744 x 100 = 33.87%