She should move it one place to the left because there is one zero in ten so however many zeros there are in the multiple of 10 that's how many times you move it. Then, you move it left to divide and right to multiply. Hope I helped!
Yes that is a repeating decimal the answer would be -0.4444444.. and so on.
Answer:
rise/run = 2/-4 or it is rise/run = -2/4
Just divide 428.00 by 100 you will get $4.28 each t shirt
-4.666666(so forth) or -4.7 if the problem requires you to round.