20 out of 25 students were 15 y/o, what percentage of the students is 15 ?

80% are 15 years old

Step-by-step explanation:

To find the percent , we need to know how many out of 100

20/25

Multiply the top and bottom by 4

20*4

25*4

80/100

This is 80%

80% are 15 years old

by definition, an arc subtended by a central angle of some given measure has the same measure. so .