To find the percentage of heads in a coin flip, you can use the following formula:
Percentage of heads = (Number of heads / Total number of flips) * 100%
In this case, you have 7 heads and 3 tails. Since there are a total of 10 flips (7 heads + 3 tails), we can calculate the percentage of heads:
Percentage of heads = (7 / 10) * 100% = 70%
So, the percentage of heads in your coin flips is 70%.