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Complete works of advanced mathematical formulas
1。 There are 60 footballs in the school, 20% more than volleyball. How many volleyballs are there in the school?

60/( 1+20%)=50

2。 There are 60 footballs in the school, which is 20% less than volleyball. How many volleyballs are there in the school?

60/( 1-20%)=75

3。 There are 60 footballs in the school, and the number of volleyball is 20% more than football. How many volleyballs are there in the school?

60*( 1+20%)=72

4。 There are 60 footballs in the school, and the number of volleyball is 20% less than football. How many volleyballs are there in the school?

60*( 1-20%)=48