Four fifths of a number is three fifths of 60. What's the number? (with equation solution)

Four fifths of a number is three fifths of 60. What's the number? (with equation solution)


Let this number be x, then
(4/15)x=60×(3/5)
(4/15)x=36
x=36×(15/4)
x=135



Six seventh of a number is one less than four fifths of fifteen. Find the number


X*6/7=15*4/5-1=11,X=77/6