Answer:
20 %
Step-by-step explanation:
% Increase = Increase/Original value × 100 %
Data:
Original = $25
This year = $30
Calculations:
Increase = This year - original
= 30 - 25
= $5
% Increase = 5/25 × 100 %
= 20 %
The percent increase of the price of the necklace was 20 %.