Question

Joanna ran a mile in physical education class. After resting for one hour her heart rate was 60 beats per minute. If her heart rate decreased by2/5, what was her heart rate immediately after she ran the mile?

Answer 1

if her heart rate decreased by 2/5ths and became 60, that means 60 is 3/5th. divide 60 by 3 to find out how much one fifth is. 60/3 = 20, so if 1/5th is 20, that makes 2/5th 40. Add 40 and 60 to get 100, which is your answer.