Let
x--------> the number
we know that
[tex] 35 [/tex] % is equal to
[tex] \frac{35}{100} =0.35 [/tex]
[tex] x*0.35=42 [/tex]
divide by [tex] 0.35 [/tex] both sides
[tex]x*\frac{0.35}{0.35} =\frac{42}{0.35\\}\\ \\ x=\frac{42}{0.35} \\ \\ x=120 [/tex]
therefore
the answer is
[tex] 120 [/tex]