Find the number `a` , if 8.4% of a is 42 (ii) 0.5% of a is 3 `1/2` % of a is 50 (iv) `100 %\ of\ a\ i s\ 100`

Explanation

(1) `8.4%` of `a` =`42`
`=>8.4/100xxa=42`
`=>a= 42xx100xx10/84`
`=> a =500`

(2) `0.5%` of ` a` is 3
`1/2`
`=>0.5/100*a=7/2`
`=>a=7xx100xx10/2xx5`
`=>a=700`

(3)`100%` of `a =100`
=`1` of `a =100`
`=>a =100`