Since Jackie has 1/3 and Steven has 4/12 we add them together
4/12+1/3= 2/3
Together they have 2/3 of a Hershey Bar
A solution to a equation is when the variable is substituted fully. That makes the equation true.
Using a savings interest calculator, I found that either way your savings grow by exactly $1,020.20, so they share the same interest.