The difference of 9/10 of a number and 30 is the same as 3/5 of the number. Find the number?

The number is 320.

Let the number = n

9/10n - 30 = 3/5

0.9n - 30 =0.6

0.9n = 0.6 + 30

0.9n =30.6

n =30.6 / 0.9

n = 34

0.9x - 30=3/5x, solve for x

x = 100