Shortcut Trick
To find the HCF of fractions, use the formula: HCF(Numerators) ÷ LCM(Denominators).
Numerators: 5, 15, 25 ⇒ HCF = 5.
Denominators: 12, 20, 30 ⇒ LCM = 60.
Required HCF = 5/60 = 1/12.
∴ The correct answer is 1/12.
Alternate Method
Given: Fractions 5/12, 15/20, and 25/30.
Formula Used: HCF of Fractions = HCF(Numerators) ÷ LCM(Denominators)
⇒ First, simplify fractions to their lowest terms:
⇒ 5/12 (Already simplified)
⇒ 15/20 = (15 ÷ 5) / (20 ÷ 5) = 3/4
⇒ 25/30 = (25 ÷ 5) / (30 ÷ 5) = 5/6
⇒ New set of fractions: 5/12, 3/4, 5/6
⇒ HCF of Numerators (5, 3, 5) = 1
⇒ LCM of Denominators (12, 4, 6) = 12
⇒ Resulting HCF = 1/12
∴ The correct answer is 1/12.
Additional Information
LCM of Fractions
To find the Least Common Multiple of fractions, use the formula: LCM = LCM(Numerators) ÷ HCF(Denominators).
Simplest Form Requirement
Always convert fractions to their simplest (lowest) form before applying the HCF or LCM formulas to avoid incorrect results.
HCF Definition
The Highest Common Factor is the largest possible number that divides each of the given numbers exactly without leaving any remainder.