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Disminución del 20%:
100% - 20% = 80% = 0,08
(a×0,8)(b×0,8)²(c×0,8)
(a×0,8)(b×0,8)²(c×0,8)
(0,8)²(0,8)²ab²c
0,4096ab²c
ab²c - 0,4096ab²c = 0,5904ab²c
=0,5904ab²c×100%
= 59,04%ab²c
Respuesta: Disminuye en un 59,04%