The correct option is B Jimmy
To determine the largest decimal value, we have to compare the tenths digits.
The greater the tenths digit, greater is the value.
In the given data, the amounts Siri and Jimmy spent have 7 in the tenths place, which is greater than 6.
Now, we will compare the hundredths places.
The greater the hundredths digit, greater is the value.
Between Siri and Jimmy, the amount that Jimmy spent has 8 in the hundredths place, which is greater than 2.
Thus, 0.78 is the largest value.
Hence, Jimmy spent the most.