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# RATIO- PERCENTAGE – ALLEGATIONS & MIXTURES

Aptitude & Reasoning

RATIO- PERCENTAGE – ALLEGATIONS & MIXTURES

If the price of commodity increases by X%, then the reduction in the consumption
so as not to increase the expenditure = ( x / 100 + x )× 100
And, in case of decrease = (x/100 − x) × 100
Let the population of a city be ‘P’ now and suppose it increases at the rate of R%
per annum, then
Population after n- years = p × (1 + R/100)^n
Population n- years ago = P/ (1+R/100)^n

If A is R% more than B, then B is less than A by = (R / 100 + R)∗ 100
If A is R% less than B, then B is more than A by = (R/100 − R) ∗ 100

ratios

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