Iris had $0.28 added in sales tax, Trey had $0.25 added in sales tax.
With this information, we now know that Iris had to pay $0.03 sales tax more than Trey.
How we get the sales tax:
Turn the percent into a decimal by moving the decimal place two times to the left. so 7% = 7. move the decimal left two times = .07
And 6.25% = .0625 because again, we moved the decimal two places to the left.
Now that we have the percents in decimal form, multiply 4 by .07 for Iris's sales tax, and multiply 4 by .0625 for Trey's sales tax. Now subtract Trey's sales tax from Iris's sales tax, and your answer is .03, now we just put that in the form of currency (money) which makes your answer $0.03 I hope that this answer helped!
