Answer: 1st lunch period = 45 students
2nd lunch period = 30 students
3rd lunch period = 75 students
Step by step solution:
From the information given,
Total students = 150
• 30% eat during the 1st lunch period, re-write the percent as a decimal 30/100 = 0.3
30% of 150 is:
[tex]150\times0.3=45[/tex]45 students eat during the 1st lunch period.
• 20% eat during the 2nd lunch period, re-write the percent as a decimal 20/100 = 0.2
20% of 150 is:
[tex]150\times0.2=30[/tex]30 students eat during the 2nd lunch period.
The remaining percentage of students eat during the 3rd lunch period.
100% - 30% - 20% = 50%
Re-write 50% as a decimal 50/100 = 0.5
50% of 150 is:
[tex]150\times0.5=75[/tex]75 students eat during the 3rd lunch period.
