In base 10 the number 25.12 actually means 20 + 5 + 1/10 + 2/100. What does the base 7 number 25.12 mean?
2 groups of 7
5 groups of 1
1 group of 1/7
2 groups of 1/49 (1/7)^2
14 + 5 + 1/7 + 2/49
2 groups of 7
5 groups of 1
1 group of 1/7
2 groups of 1/49 (1/7)^2
14 + 5 + 1/7 + 2/49