Question
Sana uses x% of her earnings on house rent, then spends
20% of the remaining on groceries, pays Rs. 9400 as miscellaneous bills, and saves Rs. 7240 from a total of Rs. 32000. Find x.Solution
ATQ, 32000 × {(100 − x)/100} × (80/100) − 9400 = 7240 = 32000 × 80/10000 × (100 − x) − 9400 = 7240 = 256 × (100 − x) − 9400 = 7240 25600 − 256x − 9400 = 7240 16200 − 256x = 7240 256x = 16200 − 7240 = 8960 x = 8960/256 = 35
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