Is 2.4 greater than 2.25

YES!!!!

2.4 > 2.25

To test for decimal size. Bring each decimal to the same number of decimal places, by inserting '0'

Hence

2.40 & 2.25 ( 2 d p in this case)

Drop the decimal point

240 & 225

Clearly 240 > 225 , hence it follows that 2.4 > 2.25