Question

a man's salary is 28800 a year.He gets an increase of rs.5040 a year.What percentage increase does he get?​

Answer 1

Given :-

• Salary = ₹28800
• Increase in salary = ₹5040

Aim :-

• To find the increase percentage.

Formula to use :-

$\longrightarrow \sf{increase\% = \dfrac{increase}{original \: price} \times 100}$

Substituting,

Answer :-

$\implies \sf{increase\% = \dfrac{5040}{28800} \times 100}$

Cancelling,

$\implies \sf{increase\% = \dfrac{5040}{288 \not0 \not0} \times 1 \not0\not0}$

$\implies \sf{increase\% = \dfrac{5040}{288} }$

By reducing to the lowest terms, we get :-

$\implies \sf{increase\% = 17.5\%}$

Some more formulas :-

$\longrightarrow \sf{selling \: price = \dfrac{100 + profit\%}{100} \times cost \: price}$

$\longrightarrow \sf{selling \: price = \dfrac{100 -loss\% }{100} \times cost \: price}$

$\longrightarrow \sf{ cost \: price = \dfrac{100}{100 + profit\%} \times \: selling \: price}$

$\longrightarrow \sf{cost \: price = \dfrac{100}{100 - loss\%} \times selling \: price}$