Question

The weight of cell phones has been decreasing 20% each year since 1983.

Based on this information, if a cell phone in 1983 weighed 2.5 pounds, how much would a phone weigh in 1984?​

Answer 1

2 pounds

Explanation:

so if we say we decrease 20% each year and we're only going one year. All you have to do is 2.5 - 20%