Question

30% of a number when subtracted from 91 gives number itself .find the number

Answer 1

let the number be A,

then
according to the question, we have

91 - A×30% = A

91 - A×30/100 = A,

91 - A×3/10 = A,

91 = A+3A/10,

91 = (10A+3A)/10,

91×10=13A,

then

13A=910,

A=910/13,

A=70

Answer 2

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