Changes

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'''[[Strangeness]]'''

π⁺ has a [[strangeness]] of 0, therefore it contains no [[strange-quark]] or [[antistrange-quark]].

'''[[Electrical Charge|Charge]]'''

π⁺ has a [[Positive Charge|positive charge]]. This can be achieved with one [[Electrical Charge|charge]] of <math>+\frac{2}{3}</math> (an [[up-quark]]) and <math>+\frac{1}{3}</math> (an [[antidown-quark]]).

An up-antidown pair.

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K^- has a [[strangeness]] of -1, therefore it contains a [[strange-quark]].

<math>-1 = -\frac{1}{3} + x</math>