`A = 33/100 + 38/100 + 67/100 + 12/100`
`= 150/100`
`= 1,5.`
`B= (1,45 xx 100)/(145 xx 5)`
`= (145 xx 1)/(145 xx 5)`
`= 1/5`.
`A=0,33+0,38+0,67+12%`
`A=0,33+0,38+0,67+0,12`
`A=(0,33+0,67)+(0,38+0,12)`
`A=1+0,5`
`A=1,5`
__________
`B=(1,45xx0,36+1,45xx0,64)/(60xx3,6−40xx5,4+145xx5)`
`B=(1,45xx100)/(145xx5)`
`B=1/5`