Let's break down the calculation step-by-step:
- First, calculate the value inside the parentheses:
- Convert 2.28 to a fraction: $$2.28 = \frac{228}{100} = \frac{57}{25}$$
- Convert the mixed number to an improper fraction: $$1 \frac{7}{25} = \frac{(1 \times 25) + 7}{25} = \frac{25 + 7}{25} = \frac{32}{25}$$
- Now subtract: $$\( \frac{57}{25} - \frac{32}{25} = \frac{25}{25} = 1 \)$$
- Perform the division:
- $$\( 1 : \frac{4}{9} \)$$
- Dividing by a fraction is the same as multiplying by its reciprocal: $$\( 1 \times \frac{9}{4} = \frac{9}{4} \)$$
- Convert 0.375 to a fraction:
- $$0.375 = \frac{375}{1000}$$
- Simplify the fraction by dividing both numerator and denominator by their greatest common divisor, which is 125: $$\( \frac{375 \div 125}{1000 \div 125} = \frac{3}{8} \)$$
- Perform the second division:
- $$\( \frac{3}{8} : \frac{1}{6} \)$$
- Multiply by the reciprocal: $$\( \frac{3}{8} \times \frac{6}{1} \)$$
- Multiply the numerators and the denominators: $$\( \frac{3 \times 6}{8 \times 1} = \frac{18}{8} \)$$
- Simplify the fraction: $$\( \frac{18}{8} = \frac{9}{4} \)$$
- Finally, subtract the results:
- $$\( \frac{9}{4} - \frac{9}{4} = 0 \)$$
Ответ: 0