Answer:
We can model the decimal number 1.7 by drawing two squares and divide each of the two squares into 10 equal parts.
Then we start shading the square such that the first square is fully shaded and in the second square we shade 7 out of the 10 parts such that 0.7 of the figure is shaded.
Hence, the total portion of the figures that are shaded are:
1+0.7=1.7