2 1/2:10=3/20
3/20+10=10 3/20
203/20+30/20=233/20
233/20=699/60-130/60=569/60
569/60*36/125=20484/7500=2 5484/7500
1) 21/2=10.5
2)21/2:10=10.5:10=1.05
3)21/6=3.5
4)1.05+10+10.5-3.5=18.05
5)36/125=0.288
6)18.05*0.288= 5.1984
..... (1.05+10+10.5-3.5)*0.288=5.1
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2 1/2:10=3/20
3/20+10=10 3/20
203/20+30/20=233/20
233/20=699/60-130/60=569/60
569/60*36/125=20484/7500=2 5484/7500
1) 21/2=10.5
2)21/2:10=10.5:10=1.05
3)21/6=3.5
4)1.05+10+10.5-3.5=18.05
5)36/125=0.288
6)18.05*0.288= 5.1984
..... (1.05+10+10.5-3.5)*0.288=5.1