The problem asks us to compare $80\%$ and $\frac{3}{4}$ and determine which sign ($>, <, =$) makes the statement true.

ArithmeticPercentageFractionsComparisonDecimal Representation
2025/4/15

1. Problem Description

The problem asks us to compare 80%80\% and 34\frac{3}{4} and determine which sign (>,<,=>, <, =) makes the statement true.

2. Solution Steps

First, we convert 80%80\% to a fraction. We know that 80%=8010080\% = \frac{80}{100}. We can simplify this fraction by dividing both the numerator and the denominator by their greatest common divisor, which is 20:
80100=80÷20100÷20=45\frac{80}{100} = \frac{80 \div 20}{100 \div 20} = \frac{4}{5}
Next, we convert the fraction 34\frac{3}{4} to a decimal by dividing 3 by 4:
34=0.75\frac{3}{4} = 0.75
We convert 80%80\% to a decimal:
80%=80100=0.80=0.880\% = \frac{80}{100} = 0.80 = 0.8
Comparing 0.80.8 and 0.750.75, we see that 0.8>0.750.8 > 0.75. Alternatively, we can convert both fractions to have a common denominator. 45\frac{4}{5} can be written as 4454=1620\frac{4 \cdot 4}{5 \cdot 4} = \frac{16}{20}. 34\frac{3}{4} can be written as 3545=1520\frac{3 \cdot 5}{4 \cdot 5} = \frac{15}{20}.
Since 1620>1520\frac{16}{20} > \frac{15}{20}, we have 45>34\frac{4}{5} > \frac{3}{4}, thus 80%>3480\% > \frac{3}{4}.

3. Final Answer

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