prosze o pomoc !!!! . dam naj !!!
Oblicz liczbę, której 25 % stanowi wartość wyrażenia:
( 16,6-13 i 3/14) × 5 ⅚
____________________
(21 - 1¼) : 2,5
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( 16,6-13 i 3/14) × 5 ⅚
____________________=
(21 - 1¼) : 2,5
(¹⁶⁶/₁₀-¹⁸⁵/₁₄)׳⁵/₆
------------------------ =
(²¹/₁-⁵/₄)÷²⁵/₁₀
(¹¹⁶²/₇₀-⁹²⁵/₇₀)׳⁵/₆
------------------------ =
(⁸⁴/₄-⁵/₄)×¹⁰/₂₅
²³⁷/₇₀׳⁵/₆
-------------- =
⁷⁹/₄×¹⁰/₂₅
⁷⁹/₄
------ =
³⁹⁵/₅₀
⁷⁹/₄÷³⁹⁵/₅₀=⁷⁹/₄×⁵⁰/₃₉₅=²⁵/₁₀=2,5
2,5×25%=0,625