-47.81% is the change from 661 to 345
Calculation steps:
[( 345 - 661 ) ÷ 661] x 100 = -47.81%
Formula
Percentage change = [(345 - 661) / 661] x 100
Subtract the new number by the original number
345 - 661 = -316
-316 ÷ 661 = -0.47806354009077157
-0.47806354009077157 x 100 = -47.81%