Question

Please answer as long as you know!

Answer 1

To order numbers, they need to all be under the form. So let's transform all this numbers to the decimal form.

3/5 = 0.6
-24% = -24/100 = -0.24
√9 = 3 = 3.0 (all integers are decimals with a zero after the decimal point)
-2 = -2.0
1.6 bar = 1.66666666666 (the bar above the 6 represents an endless number of the digit 6)
π² =  9.86........ endless
(4√5)/2 = 4.47...... endless
4(4/5) = 4 + 4/5 = 4 + 0.8 = 4.8

Now that we got all forms under the decimal form, we can order the numbers from least to greatest:

-2.0 < -0.24 < 0.6 < 1.6666 < 4.47 < 4.8 < 9.86 < 3.0
By correspondence, we get:

-2 < -24% < 3/5 < 1.6 bar < (4√5)/2 < 4(4/5) < π² < 3

Hope this helps! :D