5/9 of a piece of metal has a mass of 7kg. what is the mass of 2/7 of the piece of metal​

5/9 of mass of metalx=7kg

5/9*mass ofmetal x=7kg

divide both sides by 5/9

value of mass metalx=63/5

2/7 of mass metalx=?kg

2/7*63/5=126/35kg=3.6kg

A proportional relationship is one that as one value changes, the other one does too, so that the relationship between the values is the same.

1 cup butter/2 cups sugar is proportional to 3 cups butter/6 cups sugar, becuase 1/2=3/6.

2a: No, these do not change at the same rate.  There is no common ratio of the L and x values.

2b: Yes, the t values is always 108/100 of the P value.  No matter the P value, this relationship will be maintained.