50 because half the number of people are zombies.
<span>Answer: 18/25 ; or, write as: 0.72 .
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Explanation:
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9/20 * 4/5 = (</span>9*4) / (10*5) = 36/50 ;
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36/50 = </span>(36÷2) / (50÷2) = 18/25 ; or, write as: 0.72 .
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= 16 + 49 - 3(11) - 4(10)
= 16 + 49 - 33 - 40
= -8
