Question

30% of a number when subtracted from 91, gives the number itself. Find the number.
A.60
B.65
C.75
D.70

Answer 1

$91 - x \times 30 \div 100 = x \\ 91 = x + 0.3x \\ 91 = 1.3x \\ x = 91 \div 1.3 \\ x = 70$

Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!!}}}$
Let the number be x
ATQ
$91 - ( \frac{30}{100} \times x) = x \\ 91 - \frac{3x}{10} = x \\ 910 - 3x = 10x \\ 10x + 3x = 910 \\ 13x = 910 \\ x = \frac{910}{13} \\ x = 70$
So The number is 70

Option D is correct answer which is 70

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