Find 50% of 330.

Find 50% of 240.

Find 10% of 430.

Find 50% of 250.

Find 50% of 140.

Find 50% of 450.

Find 50% of 170.

Find 10% of 270.

Find 50% of 360.

Find 50% of 280.

Find 10% of 480.

Find 10% of 240.

Increase 450 by 10%.

Increase 410 by 10%.

Decrease 390 by 10%.

Decrease 350 by 50%.

Increase 380 by 10%.

Decrease 250 by 10%.

Increase 420 by 50%.

Decrease 150 by 50%.

Increase 310 by 10%.

Decrease 380 by 50%.

Decrease 500 by 50%.

Decrease 270 by 50%.

Decrease 190 by 50%.