A woman spends 80% of her income. With the increase in the cost of living, her expenditure increases by 37.5% and her income increases by 25%. Her present percent saving is

Tip: It is always convenient to use fractions in place of percentages. For example, 37.5% can be written as $$\frac{3}{8}$$

As per the question, the initial expenditure was 80% of her income. 

Let us assume the income as x, and her initial expenditure as $$\frac{8}{10}$$ of x. This implies that the initial saving was $$\frac{2}{10}$$x.

Now, her expenditure is increased by 37.5%, which means it becomes $$\frac{11}{10}$$x or 1.1x.

For her income, it is given that the same increased by 25%. This means that the income is now $$\frac{5}{4}$$x or 1.25x.

Subtracting her new expenditure from new income, we get the savings as 0.15x, which is 12% of 1.25x.