Question

Radha spent 80% of her income. If she left with Rs 20000 at the end of the month find her monthly income?
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Answer 1

Let, Radha's monthly income is x.

80% of her income is (80/100)x.

she left with Rs 20000 at the end of the month.

now,

x-(80/100)x=20000

or, x{(100-80)/100}=20000

or, x=20000(100/20)

or, x=100000

Radha's monthly income is 100000