What is 4 3/4 - 1/3 = in fraction form

Conversion a mixed number 4 3
4
to a improper fraction: 4 3/4 = 4 3
4
= 4 · 4 + 3
4
= 16 + 3
4
= 19
4

To find new numerator:
a) Multiply the whole number 4 by the denominator 4. Whole number 4 equally 4 * 4
4
= 16
4

b) Add the answer from previous step 16 to the numerator 3. New numerator is 16 + 3 = 19
c) Write previous answer (new numerator 19) over the denominator 4.

Four and three quarters is nineteen quarters
Subtract: 19
4
- 1
3
= 19 · 3
4 · 3
- 1 · 4
3 · 4
= 57
12
- 4
12
= 57 - 4
12
= 53
12

Ithink is a. true, but not sure