What percent of 84 is 21? Algebra Linear Equations Conversion of Decimals, Fractions, and Percent 1 Answer Sleep · Stefan V. Sep 29, 2016 #25%# Explanation: Do #(100%)/(x%)=84/21# Solve for #x# #(100/x)xxx=(84/21)xx x" "# [multiply both sides of the equation by #x#] #100=4x" "# [divide both sides of the equation by #4# to get #x#] #100/4 = (4x)/4# #25 = x# Answer link Related questions What is a percent? How are percents, decimals, and fractions related? How do you convert percents to decimals and decimals to percents? How do you change fractions to a decimal and a percent? How do you express #\frac{3}{5}# as a percent? How do you express 75% as a reduced fraction? What is #1 2/3# written as a decimal and a percent? How do you convert 87.5% as a fraction and a decimal? What is 5% of 10%? What would be the result of dividing the diameter of a circle into 8 equal parts (expressed as a... See all questions in Conversion of Decimals, Fractions, and Percent Impact of this question 25588 views around the world You can reuse this answer Creative Commons License