1000% liczby 123,4  15% liczby 1500 300% liczby 39 25% liczby 88888 1% liczby 90 

[latex] frac{1000}{100} * 123.4 = 10 * 123.4 =1234 \ frac{15}{100} * 1500 = frac{15}{1} * 15 =225 \ frac{300}{100} * 39 = 3 * 39 =117 \ frac{25}{100} * 88888 = frac{1}{4} * 88888 = frac{88888}{4}=22222 \ frac{1}{100} * 90 = frac{90}{100} = frac{9}{10}=0.9 [/latex] Procent można zapisać w ułamku jako [latex] frac{procent}{100} [/latex], np. 10 % to [latex] frac{10}{100} [/latex]