When 30% of one number is subtracted from another number, the second number reduces to its four-fifths. What is the ratio of the first to the second number?
Let the 1st number is X
and 2nd number is Y
So,
Y - 0.3X =
Y - = 0.3X
= 0.3X
= 0.3X
Y = 1.5X
Now the ratio of the 1st and 2nd no,
X : Y
X : 1.5X ( Y = 1.5X )
1 : 1.5 ( Dividing by X )
2 : 3 ( Multiplying by 2 )
Ans. 2 : 3
Let the 1st number is X, so 30% of X = =
and 2nd number is Y, so the second number reduces to its four-fifths =
What is the ratio of the X to the Y?
it is X : Y =
30% of X is subtracted from Y is, Y
according to the qiestion, Y =
or, =
or , = 4Y
or, 10Y 3X = 8Y
or, 2Y = 3X
or, =
or, X : Y = 2:3
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