Find 50% of 420.

Increase 160 by 5%.

Find 25% of 420.

Increase 360 by 90%.

Find 5% of 420.

Decrease 130 by 30%.

Find 25% of 180.

Increase 330 by 40%.

Find 70% of 420.

Decrease 350 by 60%.

Find 80% of 310.

Increase 360 by 1%.

Find 40% of 290.

Increase 150 by 20%.

Find 25% of 390.

Increase 340 by 1%.

Find 20% of 330.

Find 25% of 170.

Find 5% of 190.

Increase 110 by 40%.

Decrease 460 by 5%.

Decrease 390 by 1%.

Increase 470 by 5%.

Find 25% of 150.

Increase 140 by 25%.