Let the number = Z∴ Z - (of Z) = 87⇒ Z - (Z × 55/2 × 1/100) = 87⇒ Z - (Z × 11/2 × 1/20) = 87⇒ Z- (11Z/40) = 87⇒ 29Z/40 = 87⇒ 29Z/40 = 87⇒ Z = 87 × 40/29⇒ Z = 120

Q. 164.3( 14 Votes )

A number decrease A. 58

B. 110

C. 120

D. 135

Class 8th RS Aggarwal - Mathematics 9. Percentage

Answer :

Let the number = Z

∴ Z - (of Z) = 87

⇒ Z - (Z × 55/2 × 1/100) = 87

⇒ Z - (Z × 11/2 × 1/20) = 87

⇒ Z- (11Z/40) = 87

⇒ 29Z/40 = 87

⇒ Z = 87 × 40/29

⇒ Z = 120

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A number decrease A. 58B. 110C. 120D. 135

A number decrease A. 58

B. 110

C. 120

D. 135