The dominant hand is 10% stronger than the non-dominant hand. The dominant hand is what percent stronger than the non-dominant hand?

• A. 10%
• B. 5%
• C. 15%
• D. 20%

Answer: (A)

The key idea is that “percent stronger” is measured relative to the weaker hand. If the non-dominant hand is treated as the baseline, a 10% increase means the dominant hand is 10% more powerful than the non-dominant.

Imagine the non-dominant hand has 100 units of strength. If the dominant hand is 10% stronger, it would be 110 units. The extra 10 units represent 10% of the non-dominant hand, so the dominant hand is 10% stronger than the non-dominant.

So the correct percent stronger is 10%. This wouldn’t be 5% or another value because those would arise from using a different baseline (like the average of both hands), which isn’t how “percent stronger than” is usually interpreted.