Question

(b) What number should be subtracted from 1 to get - 7/17 ?
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Answer 1

Step-by-step explanation:

let x be the number that need to be subtracted from these numbers to make it proportional.

The new numbers will be 7−x,17−x,47−x

Since these numbers should be proportional,

7−x

17−x

=

17−x

47−x

By simplification we get,

(17−x)(17−x)=(47−x)(7−x)

x

2

−34x+289=329+x

2

−54x

20x=40⇒x=2

The new numbers will be 5,15,45

′

2

′

is the least number to be subtracted so that the numbers will be in proportional.