Brøk og prosent
Khan academy om brøk:
https://nb.khanacademy.org/math/arithmetic/fraction-arithmetic
Khan academy om prosent:
https://nb.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates#pre-algebra-intro-percents
Khan academy om brøk:
https://nb.khanacademy.org/math/arithmetic/fraction-arithmetic
Khan academy om prosent:
https://nb.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates#pre-algebra-intro-percents