Question

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match each expression to the scenario it represents.









Expressions
Scenario
the price of a game that’s been discounted
18% off its list price (x)
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the price of a toy that sells for 18% more
than the amount (x) needed to build the toy
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the volume of water remaining in a tank after
of its original volume (x) is drained out
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the total amount of flour in a bakery after receiving new stock equal to of its current stock (x)
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Answer 1

• 0.82x
• 1.18x
• 7/10x
• 13/10x

Explanation:

In each case, the multiplier of x is (1 + fractional change). The fractional change is negative for a discount or draining. It is positive for any addition or increase.

a) (1 -0.18)x = 0.82x . . . . 18% = 0.18

b) (1 +0.18)x = 1.18x

c) (1 -3/10)x = 7/10x

d) (1 +3/10)x = 13/10x