Radha earns 22% of her investment. If she earns Rs. 187, then how much did she invest?
Total earning from investment =Rs.187
Percent earning =22%
∴ Let his investment =x
Then 22% of x =Rs. 187
⇒22100×x=187⇒x=187×10022
⇒x=850
∴ Total investment =Rs. 850