Question

Paula weighed 65.5 kilograms before she started her training. She has lost 3500 grams.

Answer 1

convert gram to kilograms
1000grams=1kilograms so
3500/1000=3.5kg
she lost 3.5kg
65.5kg-3.5kg=62kg now

she weighs 62kg now or 62000grams

Answer 2

1 kilogram is 1000 grams.

Before Training : 65500g (65.5g)
Lost :                     3500g (  3.5kg)
After Training :    62000g (62g)