Question

Suzanna’s doctor told her to lose 9 kg, which was 10% of her body weight.

a) How much did Suzanna weigh?
b) If Suzanna lost 12% of her body weight, what is her new weight?

Answer 1

a) 9x 10=90
b) 10%=9 so 2%= 1.8
Now add 9 and 1.8 to get 10.8kg as your answer

Answer 2

(a) 10% of x = 9

x = 9 ⋅ (100/10)

x = 90 kg

(b) 12% of x = 12/100 of 90

Weight she lost = 10.8

Her new weight = 90 - 10.8

= 79.2kg