Answer:
Step-by-step explanation:
2/5r=2/3 : multiply both sides by the reciprocal of 2/5 (5/2)
(5/2)(2/5)r=(2/3)(5/2) : 5/2 and 2/5 cancel out, leaving r
r=(2/3)(5/2) : cancel 2
r= 5/3
