Answer:
The answer to your question is 14 students
Step-by-step explanation:
Data
Total students = 70
40% sixth-graders
20% seventh graders
40% eighth graders
The Number of seventh-graders = ?
Process
1.- Use proportions and cross multiplication to solve this problem
70 students ----------------------- 100 %
x ---------------------- 20 %
x = (20 x 70) / 100
x = 1400 / 100
x = 14 students are seventh-graders
70 students --------------------- 100 %
x --------------------- 40%
x = (40 x 70) / 100
x = 2800 / 100
x = 28 students are sixth graders
Eighth-graders = 70 - 14 - 28
= 28
Answer:
14 students are 7th graders.
Step-by-step explanation:
Since you know 20% of 70 are seventh graders, convert 20% into a decimal and then multiply it by 70 to get 14 students:
20% = 0.2
0.2(70) = 14 seventh grade band members
