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Quantitative Aptitude - Decimal Fraction - Formula & Concept Tutorial

  1. Decimal Fraction

Its is a fractions in which denominators are power of 10.

For example –

  •  
  1. Conversion of decimal into fraction

To convert decimal into fraction, find the decimal place of number.

Suppose in 0.005 decimal place is at 1000 place (103) . Then multiply and divide the number 0.005 with 103. Then the final result will be in fraction.

For example -

  1. Some Basic Formulae:
  • (a + b)2 + (a – b)2 = 2(a2 + b2)
  • (a + b)2 - (a – b)2 = 4ab
  • (a² – b²) = (a – b)(a + b)
  • (a + b)² = (a² + b² + 2ab)
  • (a – b)² = (a² + b² – 2ab)
  • (a + b + c)² = a² + b² + c² + 2(ab + bc + ca)
  • (a + b)3 = (a3 + b3 + 3ab(a+b))
  • (a³ + b³) = (a + b)(a² – ab + b²)
  • (a³ – b³) = (a – b)(a² + ab + b²)
  • (a³ + b³ + c³ – 3abc) = (a + b + c)(a² + b² + c² – ab – bc – ac)
  • When a + b + c = 0, then a³ + b³ + c³ = 3abc.
Quantitative Aptitude

Quantitative Aptitude

  • Introduction
  • Number
    • Formula & Concept
  • AP and GP
    • Formula & concept
  • Problem On Ages
    • Formula & Concept
  • Percentages
    • Formulaes and Concept
  • Profit and Loss
    • Formula & Concept
  • Ratio & Proportions
    • Formula & Concepts
  • Time and work
    • Formulae & Concepts
  • Time and Distance
    • Formula & Concept
  • Problem On Trains
    • Formula & Concept
  • Permutation & Combination
    • Formula & Concept
  • HCF & LCM
    • Formula & Concept
  • Simple Interest
    • Formula & Concept
  • Compound Interest
    • Formula & Concept
  • Decimal Fraction
    • Formula & Concept
  • Simplification
    • Formula & Concept
  • Square Roots and Cube Roots
    • Formula & Concepts
  • Average
    • Formula & Concept
  • Variation
    • Formula & Concept
  • Linear Equation
    • Formula & Concept
  • Quadratic Equation
    • Formula & Concept
  • Boats and Streams
    • Formula & Concept
  • Problem On Races
    • Formula & Concept
  • Pipes and Cisterns
    • Formula & Concept

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