If the ratio of a and B is 7:6, how many parts of a and B account for the sum of a and B

If the ratio of a and B is 7:6, how many parts of a and B account for the sum of a and B

If the ratio of a and B is 7:6, 7 / (7 + 6) = 7 / 13 of a and 6 / (7 + 6) = 6 / 13 of B

If the number a is three fifths of the number B, how much is the number B? How much is the number a less than the number B, and how much is the number B more than the number a

Analysis: the number a is three fifths more than the number B is to take the number B as the unit "1", and the number B is eight fifths less than the number a. the number B is three fifths less than the number a as the unit "1" divided by eight fifths of the number a, that is, less than 3 / 8. The best way to solve this problem is to draw a picture. Take the number B as five, the number a as eight is more than three, and we can see that the number B is less than 3 / 8
Formula: (3 / 5) / (1 + 3 / 5) = 3 / 8
A: number B is 3 / 8 less than number a

The number of a is one fifth less than that of B. what is the number of a? How much more is the number of B than that of a?

The number of a is one fifth less than that of B, the number of a is four fifths of that of B, and the number of B is one fourth more than that of A