Cannabis use among seniors increased by what percentage from 2015 to 2018?

Cannabis use among seniors increased by what percentage from 2015 to 2018?

• A. 25%
• B. 75%
• C. 50%
• D. 100%

Answer: (B)

Understanding percent change is key here. A 75% increase means the 2018 value is 1.75 times the 2015 value, so the rise equals 0.75 times the 2015 amount. For example, if 2015 use was 4%, a 75% increase would bring it to 7% in 2018. Note the distinction between percentage points and percent increase: a rise from 4% to 7% is a 3 percentage-point increase, but a 75% relative increase because 3 is 0.75 of 4. The other options correspond to smaller or larger relative increases (25% → 1.25x, 50% → 1.5x, 100% → 2x), while 75% is the value that reflects a substantial relative rise over that period.

Understanding percent change is key here. A 75% increase means the 2018 value is 1.75 times the 2015 value, so the rise equals 0.75 times the 2015 amount. For example, if 2015 use was 4%, a 75% increase would bring it to 7% in 2018. Note the distinction between percentage points and percent increase: a rise from 4% to 7% is a 3 percentage-point increase, but a 75% relative increase because 3 is 0.75 of 4. The other options correspond to smaller or larger relative increases (25% → 1.25x, 50% → 1.5x, 100% → 2x), while 75% is the value that reflects a substantial relative rise over that period.