Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What is the value of 15% of 200 + 20% of 300?
90
80
100
70
90
Use the 'zero-canceling' trick: remove the two zeros from the base numbers (200, 300) and multiply the percentage by the remaining part (e.g., 15imes2=30 and 20imes3=60).
We are given two percentage expressions: 15% of 200 and 20% of 300.
Value=(100PтАЛimesN)
Use the 'zero-canceling' trick: remove the two zeros from the base numbers (200, 300) and multiply the percentage by the remaining part (e.g., 15imes2=30 and 20imes3=60).
Students often miscalculate percentages of 100-multiples by adding extra zeros or forgetting to multiply by the coefficient (e.g., writing 15imes20 instead of 15imes2).
Calculate 15% of 200
Convert 15% to a fraction and multiply by 200: 15/100imes200=15imes2.
15%┬аof┬а200=30
Calculate 20% of 300
Convert 20% to a fraction and multiply by 300: 20/100imes300=20imes3.
20%┬аof┬а300=60
Sum the results
Add the two calculated values to get the final result.
30+60=90
A is correct because the sum of 15% of 200 (which is 30) and 20% of 300 (which is 60) equals 90.
This technique of canceling zeros is highly useful in Profit and Loss calculations and Interest problems, where base values are often multiples of 100.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants