Is this correct- 0.685 x 100 =68.5
Yes.
Yes, that is correct. When multiplying a decimal by 100, you are essentially moving the decimal point two places to the right. In this case, 0.685 multiplied by 100 equals 68.5. To verify this, you can multiply 0.685 by 100:
0.685 x 100 = 68.5