in a survey of teenagers 2/3 responded that they got regular exercise and 4/5 of those said that walking was their main form of exercise what fraction of the teenagers mainly exercise by walking
To find the fraction of teenagers who mainly exercise by walking, we need to multiply the fractions for regular exercise and the main form of exercise by walking.
Fraction of teenagers who get regular exercise = 2/3
Fraction of those who said walking was their main form of exercise = 4/5
Fraction of teenagers who mainly exercise by walking = (2/3) * (4/5)
Multiplying the numerators together: 2 * 4 = 8
Multiplying the denominators together: 3 * 5 = 15
Fraction of teenagers who mainly exercise by walking = 8/15