x + 0.25x = 1.25x
1.25x - 100%
1x - ?%
?% = 100 / 1.25 = 80%
100-80% = 20%
Надо уменшить на 20%
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x + 0.25x = 1.25x
1.25x - 100%
1x - ?%
?% = 100 / 1.25 = 80%
100-80% = 20%
Надо уменшить на 20%