Question

15% от 30 , 30% от 90, 4% от 6,4 , 15% от 5,4 помогите

Answer 1

Если тебе нужно найти процент от числа, то сначала раздели его на 100,  а затем умножь на необходимый процент:
1. 30:100*15=4.5
2. 90:100*30=27
3. 6.4:100*4=0.256
А №4 попробуй сделать сам. Должна же быть какая-то практика! 

Answer 2

Calculation of Percentages

To calculate the percentages mentioned in your question, we can use the following formulas:

1. 15% of 30: To find 15% of 30, we multiply 30 by 0.15. 15% of 30 = 30 * 0.15 = 4.5

2. 30% of 90: To find 30% of 90, we multiply 90 by 0.30. 30% of 90 = 90 * 0.30 = 27

3. 4% of 6.4: To find 4% of 6.4, we multiply 6.4 by 0.04. 4% of 6.4 = 6.4 * 0.04 = 0.256

4. 15% of 5.4: To find 15% of 5.4, we multiply 5.4 by 0.15. 15% of 5.4 = 5.4 * 0.15 = 0.81

Let me know if there's anything else I can help you with!