Link is scam. literally cap. don’t use it or what do ever!
The formula is A= 1/2b x h
Area = half of the base multiplied by the height of the triangle
To get the 66 percent of a total, you just divide the percentage by 100 then multiply it to the tax percentage which you have be also divided by 100. I hope you are satisfied with my answer and feel free to ask for if you have questions and clarifications
