Express 0.78 as a fraction.

0.78 as a fraction is and as a percentage is 78%

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39/50

Step-by-step explanation: Using the place value chart, we can recognize that 0.78 means seventy-eight hundredths which can be written as the fraction 78/100.

Notice however that 78/100 is not in lowest terms so we need to divide the numerator and the denominator by 2 to get 39/50.

So 0.78 can be written as 39/50.

Image is attached showing the place value chart.

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step-by-step explanation: