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We tried hard after school and at home with this problem.
It took 1 hour and determination to complete and we tired over 50
different attempts and strategies in till we found our answer:

There were 75 peaches
1/2 1/4 3/4 3/5 5/6 11/15 were our fractions
11/15 of 75= 55 – 1 =54
5/6 of 54 =45-1 =44
3/4 of 44 =33-1 =32
1/2 = 32= 16-1=15
3/5 of 15 =5-1=4
1/4 of 4 =1