To convert a representative fraction to a statement scale, you can divide the denominator by the numerator and multiply the result by 100. This will give you the scale of the map in percent.
For example:
i. 1:50,000 = 1/50,000 * 100 = 0.002 * 100 = 0.2%
ii. 1:400,000 = 1/400,000 * 100 = 0.0025 * 100 = 0.25%
iii. 1:100,000 = 1/100,000 * 100 = 0.01 * 100 = 1%
Therefore, the scales of the maps in statement form would be:
i. 0.2%
ii. 0.25%
iii. 1%
Note that the smaller the denominator in the representative fraction, the larger the scale of the map. This means that a map with a scale of 1:50,000 shows a larger area than a map with a scale of 1:400,000.