Commutative property fails?

Algebra Level 1

I will attempt to prove that 00=1\frac00 = 1 . In which of these steps did I first make a mistake by using flawed logic?

Step 1: We can rewrite 15 as 7+87 + 8 or 8+78 + 7.
Step 2: This means that 7+8=8+77 + 8 = 8+ 7 .
Step 3: If we move one term from each side of the equation to the other side, we will get 77=88.7-7 = 8-8.
Step 4: Dividing both sides by 888-8 gives 7788=1\frac{7-7}{8-8} = 1 .
Step 5: Since 77=07-7= 0 and 88=08-8 = 0 , 00=1 \frac00 = 1 .

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