(a000+b00+c0+d)+(a00+B0+c)+(A0+b)+a = 20 1 1

aaaa+bbb+cc+d=20 1 1

The thousandth is 2 and the percentage is 0, so a can only be equal to 1.

So BBB+CC+D = 2011111= 900.

Nine in hundreds and zero in tens, so b can only be equal to 8.

So cc+d=900-888= 12.

Ten digits are 1 and one digit is 2, so c can only be equal to 1.

d = 12- 1 1 = 1

So abcd= 18 1 1.