48 notebooks to 14 notebook what is the percent of change

Set up a proportion:

x/100 = (14-48)/48 = -34/48

Multiply the cross products:

48x = -3400

x = 70.8333... so around -70.83% change

The answer is 71% decrease(70.8%) because 48-14=34 so you put 34/48=x/100 and then you cross multiply to get 48x=3400 then you divide by 48 to get x=70.8
                                                                                                                      x=71