What is 0.65 and 0.75 reduced by?

To find what 0.65 and 0.75 are reduced by, we can look for their greatest common divisor (GCD) when expressed as fractions. Both can be converted to fractions: 0.65 is 65/100, which simplifies to 13/20, and 0.75 is 75/100, which simplifies to 3/4. However, if you're asking about their decimal reduction, they are reduced by 0.10 to become 0.55 and 0.65, respectively.