The original perimeter of the triangle was 12 m, so in order to find out the perimeter with the 1.5 scale factor, we must multiply 12 by 1.5, which equals 18
The reciprocal of any number is the number that it multiplies by to equal 1.
The reciprocal can be found by simply converting the number into a fraction and then 'flipping' the fraction as any number multiplied by its reciprocal is 1.
E.g.
No. X/Y * Y/X (its reciprocal) = 1
So, to find the reciprocal of 1.25,we should first convert 1.25 to a fraction.