Răspuns:
Explicație pas cu pas:
x*50/100 = 42
x = 100*42/50 = 84
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x*10/100 = 20
x = 100*20/10 = 200
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x*25/100 = 23
x = 100*23/25 = 92
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x*80/100 = 35
x = 100*35/80 = 43,75
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x*24/100 = 61
x = 61*100/24 = 254,1(6)