We are asked to find the result of the following
As you can see, one number is a decimal and the other is a fraction.
We need to convert either of the numbers so that they are in the same form.
Let us convert the decimal number (2.45) into a fraction
To do that, shift the decimal point to the right by 2 places and place 100 in the divisor.
Now simplify the fraction to the lowest terms
Divide both the numbers by 5
Finally, now both numbers are in fraction so let us perform the subtraction.
Let us perform the subtraction of fractions by using the LCM method.
Multiply the denominators (20 and 7) so the LCM is 140.
Now 140 divide by 20 is 7 (so multiply 7 with 49)
Now 140 divide by 7 is 20 (so multiply 20 with 6)
Therefore, the result of the subtraction is 223/140