Change the fraction and decimal to percentage so that they will all be in percentages.

Percentage is simply multiplying by 100%.

0.45 ⇒ 0.45 x 100% = 45%

$\frac{3}{4}$ ⇒ $\frac{3}{4}$ x 100% = 75%

25% is already in percentage

Now arrange in ascending order

Note: Ascending means from lowest to highest.

25%, 45%, 75%

45% = 0.45

75% = $\frac{3}{4}$

Hence the ascending order is 25%,0.45,$\frac{3}{4}$

Let y = area of the field

First day area cleared = 40% of y

First day area cleared = $\frac{40}{100}$ x y = 0.4y

Remaining uncleared area = y - 0.4y

Remaining uncleared area = 0.6y

Second day area cleared = 60% of remaining

Second day area cleared = $\frac{60}{100}$ x 0.6y

Second day area cleared = 0.36y

Remaining area after the second day = 0.6y - 0.36y

Remaining area after the second day = 0.24y

Percentage = $\frac{\mathrm{Number}}{\mathrm{Total}}$ x 100%

Percentage of the land remaining at the end of the second day = $\frac{\mathrm{0.24y}}{\mathrm{y}}$ x 100%

Note: the ys cancel each other.

Percentage of the land remaining at the end of the second day = $\frac{\mathrm{0.24\; x\; 1}}{1}$ x 100% = 24%