Multiplier — Grade 7 Accelerated, what it means and where it is taught
The single number you multiply by. A 20% increase has multiplier 1.20.
Taught in Grade 7 Accelerated.
Where it is taught
Practise this idea
3 questions in the course bank use Multiplier, in Proportional Reasoning with Percents, Multi-Step Equations.
Problem 1
A price goes up 20%, then down 20%. The final price is what percent of the original?
Worked answer
96
Up 20%: multiplier 1.20
Down 20%: multiplier 0.80
1.20 × 0.80 = 0.96 = 96%
A 4% net decrease — the two changes are measured from different starting points.
Problem 2
A $1,200 laptop is 15% off, then 8% tax is added to the sale price. Find the final cost.
Worked answer
1101.60
Sale: 1200 × 0.85 = 1020
Tax: 1020 × 1.08 = 1101.60
Or in one line: 1200 × 0.85 × 1.08 = 1101.60
Problem 3
Solve -3(x - 5) = 21.
Worked answer
-2
-3x + 15 = 21
-3x = 6
x = -2