First we calculate 20% of the price:
20% of 30$ is 0.2*30$=6$.
Then we subtract 6$ (that is 20% of the price) from 30$, and get 24$.
Thus, the sale price is 24$
It would be 5 1/10 because 5 is the whole number
Basically, it asks you to find the piece of data that is 1/10th of the overall shoe sales on a given day. As the number of shoes sold per day is 400, the piece of data you are looking for is 40. Meaning the answer is 'High heels sold on Friday'
The clock breaks down to a different number sequence 2 B .5 it would be half past the hour 15 minutes past the hour would be 1 / 4 or .25