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 21570 views around the world You can reuse this answer Creative Commons License