80'in %25'i 20 eder. Hesaplama şu şekilde yapılır: 1. 80 sayısı 100'e bölünür: 80 ÷ 100 = 0.8. 2. Yüzde kaç ise (25) bu sonuç (0.8) yüzde sayısı ile çarpılır: 25 × 0.8 = 20.
25'in yüzde 10'u 2,5'tir. Hesaplama adımları: 1. 25 sayısını 100'e böl: 25 ÷ 100 = 0,25. 2. Yüzde 10'u bulmak için sonucu 10 ile çarp: 0,25 × 10 = 2,5.
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