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If 37.5% of laptop sold by store L in June is defective, then find the non-defective laptop sold by store L in June.
175
142
145
125
None of the above
175
Convert 37.5% to the fraction 3/8. Non-defective is 5/8 of the total. Calculate (5/8) * 280 = 5 * 35 = 175.
Store L laptop sales in June = 280, Defective percentage = 37.5%
Non-defective=Total├Ч(1тИТ100PercentageтАЛ)
Convert 37.5% to the fraction 3/8. Non-defective is 5/8 of the total. Calculate (5/8) * 280 = 5 * 35 = 175.
Students often calculate the number of defective laptops (105) and forget to subtract it from the total or confuse 37.5% with 62.5% as the final answer.
Identify given data
From the table, the total number of laptops sold by Store L in June is 280. The defective rate is 37.5%.
Total=280,Defective┬аrate=37.5%
Determine non-defective percentage
Since 37.5% are defective, the percentage of non-defective laptops is 100% - 37.5% = 62.5%.
Non-defective┬аrate=100%тИТ37.5%=62.5%
Convert percentage to fraction
62.5% can be written as 62.5/100, which simplifies to 5/8.
10062.5тАЛ=1000625тАЛ=85тАЛ
Calculate final result
Multiply the total sales by the non-defective fraction to get the count.
Non-defective=280├Ч85тАЛ=35├Ч5=175
A is correct because the calculation of 62.5% of 280 results in 175 non-defective laptops.
Using fraction equivalents for common percentages like 37.5% (3/8), 62.5% (5/8), and 87.5% (7/8) significantly speeds up arithmetic in banking and competitive exams.
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