Please help with question tagged below. thank you

1 6/7

Step-by-step explanation:

2 3/5 ÷ 1 2/5

Change to improper fractions

2 3/5 = (5*2 +3)/5 = 13/5

1 2/5 = (5*1 +2)/5 = 7/5

13/5 ÷ 7/5

Copy dot flip

13/5 * 5/7

The 5's cancel

13/7

Change back to a mixed number

7/7 + 6/7

1 6/7

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents