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Math · 7th Grade
Percent Increase and Decrease
Change over original — and why the original is always the bottom.
How to use it
Ask what the change is being compared to. That number goes on the bottom.
Free · print-ready PDF · US Letter and A4
- Grade
- 7th Grade
- Ages
- 12–13
- Subject
- Math
- Pages
- 1
The rest of the 7th Grade wall
49 more posters, all free to print — 11 of them here.
Solving ProportionsTwo equal ratios, and the cross-multiplication that solves them.Constant of ProportionalityThe single number that turns one quantity into the other, every time.Tax, Tip and DiscountThree names for the same multiplication.Operations with Rational NumbersNegative fractions and decimals — convert to one form, then apply the sign rule.Two-Step EquationsUndo in reverse order: plus and minus first, then times and divide.Variables on Both SidesCollect the letters on one side and the numbers on the other.Circumference of a CircleThe distance around, and the two formulas that are the same formula.Area of a CircleSquare the radius, never the diameter.Angle PairsFive relationships that let you find a missing angle without measuring.ProbabilityA number between 0 and 1 — and what it does and does not promise.Probability of Two EventsMultiply for 'and', add for 'or' — once you have checked they cannot overlap.