Let her monthly income = $x.
she saves = x of
So she spends =
Now as per question,
Hence her monthly income is $1120
her yearly income will be $1120 * 12 = $13440
Nityananda has shown an algebraic solution, by forming and solving an equation.
You can also do this using direct proportion.
If the lady saves
You are told that the amount she spends is $800.
So, if $800 represents
The relationship between
This is her monthly income.
Her annual income will be