Set up a proportion.
2 3/4 meters = 2.75 meters (I'll translate this back into fractions at the end).
The cost is 432.5
1 / 2.75 = x / 432.5 Cross multiply
2.75 x = 1 * 432.5 Divide by 2.75
x = 432.5/2.75
x = 157.27 Rs
So the cost of 1 meter is 157 Rs and 27 Paise. I guess you would round down to 25 Paise since anything under 25 Paise is no longer legal tender or will soon not be.