percent means parts out of 100
x%=x/100
145%=145/100=14.5/10=1.45/1=1.45
'of' means multiply
'is' means equals or '='
we will represent 'what number' by 'n'
so
145% of what number is 29 means
1.45 times n=29
divide both sides by 1.45
n=20
the number is 20