Oblicz, o ile procent liczba b jest większa od liczby a - Zadanie 4: Matematyka z plusem 1

Rozwiązanie

liczba a	liczba b	różnica liczb (b-a)	o ile procent liczba b jest większa od liczby a (jakim procentem liczby a jest różnica)	o ile procent liczba a jest mniejsza od liczby b (jakim procentem liczby b jest różnica)
$5$	$20$	$20 - 5 = 15$	$\frac{15}{5} = 3 = 300 %$	$\frac{15}{20} = \frac{3}{4} = 75 %$
$8$	$12$	$12 - 8 = 4$	$\frac{4}{8} = \frac{1}{2} = \frac{50}{100} = 50 %$	$\frac{4}{12} = \frac{1}{3} = \frac{1}{3} \cdot 100 % = \frac{100}{3} % = 33 \frac{1}{3} %$
$50$	$60$	$60 - 50 = 10$	$\frac{10}{50} = \frac{20}{100} = 20 %$	$\frac{10}{60} = \frac{1}{6} = \frac{1}{6} \cdot 100 % = \frac{100}{6} % = \frac{50}{3} % = 16 \frac{2}{3} %$
$7$	$12$	$12 - 7 = 5$	$\frac{5}{7} = \frac{5}{7} \cdot 100 % = \frac{500}{7} % = 71 \frac{3}{7} %$	$\frac{5}{12} = \frac{5}{12} \cdot 100 % = \frac{500}{12} % = \frac{250}{6} % = \frac{125}{3} % = 41 \frac{2}{3} %$
$80$	$140$	$140 - 80 = 60$	$\frac{60}{80} = \frac{3}{4} = 75 %$	$\frac{60}{14} = \frac{6}{14} = \frac{3}{7} = \frac{3}{7} \cdot 100 % = \frac{300}{7} % = 42 \frac{6}{7} %$
$20$	$34$	$34 - 20 = 14$	$\frac{14}{20} = \frac{7}{10} = \frac{70}{100} = 70 %$	$\frac{14}{34} = \frac{7}{17} = \frac{7}{17} \cdot 100 % = \frac{700}{17} % = 41 \frac{3}{17} %$
$17$	$80$	$80 - 17 = 63$	$\frac{63}{17} = \frac{63}{17} \cdot 100 % = \frac{6300}{17} % = 370 \frac{10}{17} %$	$\frac{63}{80} = \frac{63}{80} \cdot 100 % = \frac{6300}{80} % = \frac{630}{8} % = 78, 75 %$
$12$	$390$	$390 - 12 = 378$	$\frac{378}{12} = \frac{126}{4} = \frac{63}{2} = 31 \frac{1}{2} = 31, 5 = 3150 %$	$\frac{378}{390} = \frac{37800}{390} % = \frac{3780}{39} % = 96 \frac{36}{39} % = 96 \frac{12}{13} %$
$8$	$100$	$100 - 8 = 92$	$\frac{92}{8} = \frac{92}{8} \cdot 100 % = \frac{9200}{8} % = \frac{4600}{4} % = \frac{2300}{2} % = 1150 %$	$\frac{92}{100} = 92 %$