John spent 40 percent of his earning last month on rent and 30 percent less than what he spent on rent to purchase a new dishwasher. What percent of last month's earning did John have left over?

Created: 5 months ago | Updated: 1 week ago

Job Solution Dhaka Bank Ltd Dhaka Bank Ltd. || Management Trainee Officer (2019) || 2019 গণিত

প্রশ্নে বলা হচ্ছে যে, জন গত মাসে তার বেতনের 40% ভাড়া বাবদ খরচ করলেন। ভাড়া বাবদ যা খরচ করেছিলেন তার চেয়ে 30% কম খরচ করে তিনি একটি মেশিন কিনলেন। তার কাছে আর কত টাকা আছে?

30% কম Spend করা মানে 40 টাকার 70% খরচ করেছে মেশিন কেনায়। এখন এই 40 এর 70% = 28 টাকা। আর ভাড়া বাবদ খরচ করেছে 40 টাকা । এই 40 ও 28 যোগ করে যোগফল 100 থেকে বিয়োগ করলেই অবশিষ্ট টাকা পাওয়া যাবে।

Let, John total income is 100 Tk.

He spent 40% of his income on rent = 100 of 40%

$= 100 \times \frac{40}{100} = 40 T k .$

Since he spent 30% less than what he spent on rent

So, he purchased dishwasher = 40 of 70%

$= 40 \times \frac{70}{10} = 28 T k .$

Hence, John has left last month = 100-(40+28) = 32 Tk.

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