Let two numbers a and b
a*b = L.C.M * H.C.F
to understand this formula we take an example:
By prime factorization
6 = 2*3
12 = 2*2*3
common factors = 2 and 3
H.C.F = 2*3 // here we take common factors only
L.C.M = 2*3*3 // here we take common factors and rest of the numbers got through prime factorization
now by observation
H.C.F * L.C.M = 2*3*2*3*3 = 6*12
Get back to question let another number is x
x*725 = 145 * 2175
x = 145*2175 / 725
x = 435
Written on July 7, 2017, 4:11 p.m.