Answer:
The percentage of income she should use on the rest of her expenses=20%
Step-by-step explanation:
Step 1: Determine her total income
Let her total percentage income be =100%
Step 2: Determine amount of each expense
The amount of each expense can be expressed;
Amount of each expense=percentage of total expense×total income
a). Savings
percentage expense on savings=10%
b). Rent
percentage expense on rent=30%
c). Fixed expenses
percentage expense on fixed expenses=40%
d). The rest expenses
percentage expense on the rest=x
Step 3: Calculate total percentage income
Total percentage income=percentage on savings expenses+percentage on rent expenses+percentage on fixed expenses+remainder
replacing;
Total expenses=(10+30+40+x)=x+80
Total percentage income=100%
Step 4: Get remaining percentage amount of her income
(100)=(x+80)
x=100-80
x=20
The percentage of income she should use on the rest of her expenses=20%
