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math formulas

2011 - math formulas

QuestionAnswer
Percent Proportion is/of = %/100
Percent Of Change Proportion change/original=%100
Sales Tax original price x tax %(as a decimal)= Tax amt. = original price+ tax
Tip 1. original price x tip (as a decimal)= tip amt. 2. total amt. = original price + tip amt.
Discount 1. original price x discount %(as a decimal) = discount amt. 2. total amt.= original price- discount amt.
Simple Interest interest= principal x rate x time (I =prt)
Area Of a Rectangle Area = base x height or length x width
Area Of a Triangle Area = (base x height) /2
Area of a Trapezoid Area = height(base 1 + base 2)/2
area of a circle Area = pi x Radius^2
Created by: 17grahat
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