-69.86% is the change from 491 to 148
Calculation steps:
[( 148 - 491 ) ÷ 491] x 100 = -69.86%
Formula
Percentage change = [(148 - 491) / 491] x 100
Subtract the new number by the original number
148 - 491 = -343
-343 ÷ 491 = -0.6985743380855397
-0.6985743380855397 x 100 = -69.86%