I don't count approaches because it's the wrong mentality, you're coming at it from the wrong angle. In daygame apart from the 5 first approaches which I instantly discount because I'm getting into a more sociable mood, the number of approaches doesn't matter.
Number of solid leads > Number of approaches
Get the number of approaches mentality out of your head, it will f*ck your game up in the long run. This is because your validation has come from the approach, you've already ticked the box before anything's really happened. You can approach 100 girls a day and get blown out 100 times, yet you've completed your goal?! Concentrate on getting solid phone numbers and getting dates on the spot. If you're approaching in the day, I found girls will always say "I have to go and do XYZ" in order to seem busy. Don't buy that crap, they're usually just shopping and you probably made their day but they feel like they have to say it. Before they even get a chance to say it, just say "one more quick thing before I go" ...then start a new conversation thread when you see her start to move away.
Approaching in the day is sort of easier than at night in the sense that you don't have the competition and that she will be nervous like you. I've seen girls get instantly attracted to me just because of the way I've approached them during the day, so yeah, approach until you have solid leads. Keep the eye contact strong, smile and most girls will hear you out.
What happened when the girls walked off? Like how did you approach and what stage did they walk off?