When a number is decreased by 47%, the result is 20. What is the original number to the nearest tenth?
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Answer:
150
Step-by-step explanation:
100% represents 500 jars
Subtract the sum of the percentage of other jars for percent of blue jars
100 - (30 + 25 + 15) = 100 - 70 = 30%
That is 30% of the jars are blue
Calculate 30% of 500 to obtain number of blue jars
30% = = 0.3, hence
number of blue jars = 0. 3 × 500 = 150