Agatha wants to buy a cellphone. She has to decide between a new phone or an second hand phone. She saw that the new iPhone costs 120$ and that the second hand one costs 1/4 less of the
price of the new phone. What’s the price of the second hand cellphone?

90 dollars

Step-by-step explanation:

1/4 it kind of refer to 120/4

120/4 = 30

if the problem says $120 less 1/4(30 dollars) = 90 dollars

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!