[CSAT][CAT] Basic Numeracy – Percentages – Multiplying Factor (Tips &Tricks) – 4
Regaining back from our last post : [CSAT][CAT] Basic Numeracy – Percentages – Base (Tips &Tricks) – 3, now lets learn the concept of Multiplying Factor and how relevant it is in calculations of CAT & UPSC CSAT Prelims questions.
If a number for e.g. 200 is increased by 30% what will be the final number ?Final Number = 200 + 30% of 200= 200 + (30/100)x200= 200 + 60= 260.
Final Number = 200 + 30% of 200= 200(1 + 30%)= 200 (1 + 0.3)= 200 x 1.3= 260
Lets move towards another perspective of MF.
Percent of a percent
What is 10% of 20%?(10/100) x (20/100) = 0.1 x 0.2 = 0.02.
What is 10% of 20% of 40% ?(10/100) x (20/100) x 40% = 0.02 x 40% = 0.8%
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