6) Percentage of a quantity 1)What is 20% of 150?2) 15% of a number is 75. What is the number?3) If 40% of the students in a class are girls and there are 80 students in total, how many girls are there?​

Ответ:

1) 150 - 100%

X - 20%

X = (150×20)/100=30

2) 75 - 100%

X - 15%

X=(75×15)/100= 11,25

3) 80 - 100%

X - 40%

X= (80×40)/100= 32 girls