Correct Answer - Option 1 : 50%
Concept:
% \( Increase=\frac{New\ price-Old\ price}{Old\ price}\times100\)
Calculation:
Given:
New price = 90 Rs, Old price = 60 Rs
% \( Increase=\frac{90-60}{60}\times100=\frac{1}{2}\times100=50\)
Hence price will increase by 50%