Question

50% of Number is 250 what is 80% of that number

Answer 1

We have an equation: 250/?= 50/100

Cross multiply:
50*?= 250*100
⇒ ?= 250*100/50= 500

The number is 500~

We have another equation: ?/500= 80/100

Cross multiply:
100*?= 80*500
⇒?= 80*500/100= 400

80% of 500 is 400~