The costs of two sound systems were decreased by $10. the original costs of the systems were $90 and $60. without calculating, which had a greater percent decrease? explain

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Mathematics

Katelyn Brown

25 December, 13:42

The costs of two sound systems were decreased by $10. the original costs of the systems were $90 and $60. without calculating, which had a greater percent decrease? explain

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Eleanor Shelton · Answer 1

Without calculating we can say that the system with the original cost $60 (the cheaper system) had a greater percent decrease.

This is because $10 is a greater percentage of $60 than it is of $90 (if we calculate it is 16.66% in the first case and 11.11% in the second case).