those are mixed number so first, convert them into improper fractions:
2 × 5 + 3 =13 thats [tex] \frac{13}{2} [/tex] 1 × 2 + 4 = 6 thats [tex] \frac{6}{1} [/tex] now they need to have the same denominator and the LCD is 2 so: 6 ×2 = 12 and 1 ×2 = 2 thats [tex] \frac{13}{2} - \frac{12}{2}[/tex] [tex] = \frac{1}{2} [/tex]