Question

0,35 reprezinta 0,5% din x


1,(8) reprezinta 0,2(7)% din x

Answer 1

x × 0,5% =0,35
x=0,35 :0,5%=35/100 ×1000/5=70

1,(8)=(18-1)/9=17/9

0,2(7)= 25/90 = 5/18
x × (5/18)/100 = 17/9
x×5/1800=17/9
x=17/9  × 1800/5 = 680