$10 + 2 + 40 \times \frac{1}{100} + 5 \times \frac{1}{100}$

$1 \times 10 + 2 \times 1 + 4 \times \frac{1}{10} + 0 \times \frac{1}{100} + 5 \times \frac{1}{1000}$

$1 \times 10 + 2 \times 1 + 4 \times \frac{1}{100} + 5 \times \frac{1}{10}$

$12 + 4 \times \frac{1}{100} + 5 \times \frac{1}{1000}$