The sales of a particular brand of children’s athletic shoes rose from $4,800,000 to $5,400,000. find the percent of increase in sales. round to the nearest tenth of a percent if necessary

It increased by 12.5%.

To find the percent of increase or decrease, find the amount of increase or decrease first.  Do this by subtracting the new minus the old:

5,400,000 - 4,800,000 = 600,000

Now we divide this by the original amount to find the percent:
600,000/4,800,000 = 0.125.

Multiply this by 100 to get it in terms of a percent:
0.125(100) = 12.5%.