Two-Way TablesTwo categories at once, and the three different percentages you can read from one.8th GradeA two-way table sorts data by two variables. The totals row and columnmatter as much as the cells.1READ THE HEADINGSOne variable across, one down.2FIND THE TOTALSRow totals, column totals, and the grand total.3DECIDE THE DENOMINATOROut of the whole table, out of one row, or out of one column?4CALCULATECell divided by whichever total the question asked about.THREE DIFFERENT ANSWERS12 of 100 people = 12% of everyone12 of 40 girls = 30% of the girls12 of 25 who chose it = 48% of that groupChange the denominator and the same cell gives a completely differentpercentage. Read the question twice.Two-Way Tableslearnposters.com
Two-Way Tables — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Two-Way Tables, step by step

A two-way table sorts data by two variables. The totals row and column matter as much as the cells.

  1. READ THE HEADINGSOne variable across, one down.
  2. FIND THE TOTALSRow totals, column totals, and the grand total.
  3. DECIDE THE DENOMINATOROut of the whole table, out of one row, or out of one column?
  4. CALCULATECell divided by whichever total the question asked about.

three different answers

  • 12 of 100 people = 12% of everyone
  • 12 of 40 girls = 30% of the girls
  • 12 of 25 who chose it = 48% of that group

Change the denominator and the same cell gives a completely different percentage. Read the question twice.

Questions about the Two-Way Tables poster

What’s on the Two-Way Tables poster?
4 numbered steps, with a full worked run-through. A two-way table sorts data by two variables. The totals row and column matter as much as the cells. READ THE HEADINGS — One variable across, one down.; FIND THE TOTALS — Row totals, column totals, and the grand total.; DECIDE THE DENOMINATOR — Out of the whole table, out of one row, or out of one column?; CALCULATE — Cell divided by whichever total the question asked about.. Change the denominator and the same cell gives a completely different percentage. Read the question twice.
Who is the Two-Way Tables poster for?
Two-Way Tables is filed under 8th Grade (ages 13–14), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
When should you use the Two-Way Tables poster?
Always ask what the percentage is out of. That is where these questions are won. A wall chart earns its place by being glanceable from where the work is happening, so Two-Way Tables belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Two-Way Tables?
Angles and Parallel Lines, Distance and Midpoint and Exponent & Radical Rules sit alongside Two-Way Tables in the 8th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Angles and Parallel LinesDistance and MidpointExponent & Radical Rules
Is the Two-Way Tables poster free to download and print?
Yes. Two-Way Tables downloads as a free PDF with no account, no email and no watermark, like everything else in the 8th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Two-Way Tables poster print at?
Two-Way Tables is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Two-Way Tables loses nothing.Printing guide

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