Answer:

Step-by-step explanation:
For question #1:

For question #2:

Answer:
$10880
Step-by-step explanation:
12800-15%=10880

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Write the divide fraction horizontally:
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Factorise the numerators and denominators when possible:
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Convert the divide fraction to multiplication fraction
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Cancel the factors
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Combine to single fraction
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Answer:
50% decrease
Step-by-step explanation:
I took the test
(12 x 9) + (12 x 6/2). The answer would be 144 but rounded it would be 100