Question

Число 400 уменьшили на 40%, а затем полученное число увеличили на 80%. Какое число получили в итоге?

Answer 1

Ответ: 432

Решение:

400 / 100 = 4

4 * 40 = 160

400 - 160 = 240

240 / 100 = 2,4

2,4 * 80 = 192

240 + 192 = 432

                 

Answer 2

Problem Analysis

We are given a number, 400, which is first decreased by 40% and then increased by 80%. We need to find the final number after these operations.

Calculation

To find the final number, we can follow these steps:

1. Decrease 400 by 40%: - 40% of 400 = 0.4 * 400 = 160 - Subtract 160 from 400: 400 - 160 = 240

2. Increase the result by 80%: - 80% of 240 = 0.8 * 240 = 192 - Add 192 to 240: 240 + 192 = 432

Answer

The final number obtained after decreasing 400 by 40% and then increasing the result by 80% is 432.