Judy buys dorito bags $0.40 each and sold them for $1.00 each. what was the percent increase

Getting the percentage increase, we can form the formula or equation.
Percentage increase = ($1.00 - $0.40) / $0.40 * 100
Percentage increase = ($0.60) / $0.40 * 100
Percentage increase = 1.5 * 100
Percentage increase = 150%

So there is a 150% increase from the original price.