Step 1 :\( \frac{750 \mathrm{mg}}{6 \mathrm{servings}} = 125 \mathrm{mg/serving} \) for orange juice
Step 2 :\( \frac{135 \mathrm{mg}}{1.5 \mathrm{servings}} = 90 \mathrm{mg/serving} \) for cranberry juice
Step 3 :Orange juice has \( 125 - 90 = 35 \)mg more vitamin C per serving than cranberry juice