Transcript 7-1 Ratios Powerpoint

Ratios
LESSON 7-1
Course 1
Additional Examples
During a school trip, there are 3 teachers and 25
students on each bus. Write each ratio in three ways.
a. teachers to students
There are 3 teachers and 25 students.
teachers to students
3 to 25 or 3 : 25 or 3
25
b. students to teachers
There are 25 students and 3 teachers.
students to teachers
25 to 3 or 25 : 3 or
25
3
Ratios
LESSON 7-1
Course 1
Additional Examples
Write two different ratios equivalent to 24 : 8.
24 : 8
Divide each
term by 8.
÷8
24 : 8
÷8 ÷2
3:1
÷2
12 : 4
Two ratios equal to 24 : 8 are 3 : 1 and 12 : 4.
Divide each
term by 2.
Ratios
LESSON 7-1
Course 1
Additional Examples
Write each ratio in simplest form.
a. 121 to 11
121 to 11
÷ 11
÷ 11
11 to 1
In simplest form, the ratio 121 to 11 is 11 to 1.
b. 28 : 16
28 : 16
÷4
÷4
7:4
In simplest form, the ratio 28 : 16 is 7 : 4.