By what percent is 70 less than 200

200/x=100/70

(200/x)*x=(100/70)*x       - we multiply both sides of the equation by x

200=1.42857142857*x       - we divide both sides of the equation by                                                                                       (1.42857142857) to get x
200/1.42857142857=x
 


x=140

Bc equals mb that should be your answer