There are 30 days in June. So 30 days represent 100% of the days. We have:
30 ----- 100%
x ------ 70% 100x= 2100 x= 21
Additionally, you can do to know the percentage of a number: 30 multiplied by 0.7 you will have 21. 0.7 means you are calculating 70% of the number you are multiplying.
