An airline allows each passenger 30 kilograms of luggage. Carl has to lower the weight of his suitcase by 25% to stay within the
limit. How much did the suitcase originally weigh?
2 answers:
If he had to lower it by 25%, it currently weight 75% of its original weight so if we let w=original weight:
w(75/100)=30 multiply both sides by 100
75w=3000 divide both sides by 75
w=40
So the original weight of the luggage was 40 kilograms.
30 kg is (100-25) = 75% of the original weight
so original weight = 30 / 0.75 = 40kg
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