Cost of a television Ms. Singh wants to buy = £840
Ms. Singh's weekly wage = £300
Money she saves each week :
= 40% of her weekly wage
[tex] =\tt 40\% \: of \: 300[/tex]
[tex] = \tt \frac{40}{100} \times 300 [/tex]
[tex] =\tt \frac{40 \times 300}{100} [/tex]
[tex] =\tt \frac{12000}{100} [/tex]
[tex]\color{plum} = \tt£120[/tex]
Thus, Ms. Singh's weekly savings = £120
Number of weeks in which she will be able to buy a TV :
[tex] = \tt \frac{840}{120} [/tex]
[tex]\color{plum} =\tt 7 \: weeks[/tex]
Therefore, Ms. Singh will be able to buy a TV from her savings in 7 weeks.