What is bigger 80% of 90 or 1/2 of 140

This is a question related to comparing two cases that are given and finding out the bigger number. In the first case we have to find out 80% of 90
Then
80% of 90 = (80/100) * 90
                 = 72
So we can easily find that 72 is the 80% of 90.
In the second case we have to find the 1/2 of 140
Then
I/2 of 140 = (1/2) * 140
               = 70
So we come to know that the half of 140 is 70.
Then we can easily say that 80% of 90 is bigger than 1/2 of 140.

Letter c i’d say