if 1200 people go to the football match and 54% leave at half time, how many people are left in the ground for the second half?
If 54% of the people leave at halftime, then that means that there are 100% - 54%= 46% of the people left.
So you just take 46% x 1200 and you will get 552.
Therefore, 552 people are left in the ground for the second half