Answer: D) 4/5
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Step-by-step explanation:
There are a few ways to see how this is the answer.
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The first is to notice how 16/20 = 0.80 when using long division or a calculator. At the same time, 4/5 = 0.80 as well. So that means 16/20 = 4/5.
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Another way to see how this works is to multiply top and bottom of 4/5 by 4. So we have 4*4 = 16 as the new numerator and 5*4 = 20 as the new denominator. Going in reverse, you can divide each piece of 16/20 by the GCF 4 to reduce this fraction into 4/5.
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Finally, we can equate the two fractions and cross multiply
16/20 = 4/5
16*5 = 20*4
80 = 80
Both sides are the same value, so that confirms the original equation is true as well.