Number line math

Question

Find the number that is 9/10 of the distance from -10 to -9

also find the number that is 7/9 if the distance from 3 to 5

Answer 1

-10 to -9 is 1 unit

9/10 of 1 = 9/10

-10 + 9/10 = -10 + 0.9 = - 9.1

3 to 5 = 2

7/9 of 2 = 14/9

3 + 14/9 = 4 5/9 = 4.555...