SOLUTION: A cost of a mobile phone was reduced by 30% and then by a further 40% what was the overall percentage reduction?

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Question 1005056: A cost of a mobile phone was reduced by 30% and then by a further 40% what was the overall percentage reduction?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
Starting with price p,
Keep 70%; and then keep 60%.
Fully discounted price becomes p%2A%280.7%29%280.6%29=0.42%2Ap, which is 0.58 fraction reduction, OR 58% reduction.