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

The one that costs the least ($60) has a greater percent decrease since 10 dollars is deducting a 1/6 of the original cost while the latter is only 1/9 of the cost. 1/6 is a greater fraction that 1/9

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