65% of a number is 21 less then 4/5 of that numberwhat is number
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Let's assume the required number as x
According to Question,
65% of x = 4 / 5 of x - 21
⇒ 65 / 100 × x = 4x / 5 - 21
⇒ 13x / 20 = 4x / 5 - 21
⇒ 13x / 20 = (16x - 420) / 20
⇒ 13x = 16x - 420
⇒ 13x - 16x = - 420
⇒ - 3x = - 420
⇒ 3x = 420
⇒ x = 420 / 3
⇒ x = 140
As, the required number is x
Hence, the required number is 140
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According to Question,
65% of x = 4 / 5 of x - 21
⇒ 65 / 100 × x = 4x / 5 - 21
⇒ 13x / 20 = 4x / 5 - 21
⇒ 13x / 20 = (16x - 420) / 20
⇒ 13x = 16x - 420
⇒ 13x - 16x = - 420
⇒ - 3x = - 420
⇒ 3x = 420
⇒ x = 420 / 3
⇒ x = 140
As, the required number is x
Hence, the required number is 140
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