Numerical Ability - Simplification & Approximation
Approximate: A value 800 is increased by 15% and then by 10% (round final result to nearest ten)
Approximate: A value 800 is increased by 15% and then by 10% (round final result to nearest ten)
hard Q10 of 15
Step-by-Step Solution
Step 1: Apply the first percentage increase
After +15%: 800 × 1.15 = 920.Step 2: Apply the second percentage increase
Then +10%: 920 × 1.10 = 1012.Step 3: Round to the requested precision
Round to nearest ten → 1010.Final Answer:
1010 → Option D.Quick Check:
Net factor = 1.15 × 1.10 = 1.265 → 800 × 1.265 = 1012 → nearest ten = 1010 ✅
Quick Trick: Apply successive percentage multipliers then round at the end.
Common Mistakes:
- Adding percentages directly instead of multiplying successive factors.
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