Sagot :
a.) Yes, there is an increase since normally Jen only has 1000 a week as a salary and since Jen receives 1,100 this week, it means that there is an increase of 100 pesos in her salary.
b ) The increase in Jena's salary has a total amount of 100 pesos.
C.) The change of percentage from 1000 to 1100 pesos is 110%( basically another added 10% for the salary.)