Percentages

How it works

• 110% — divide by 10 (move the decimal one place).
• 21% — divide by 100 (move it twice).
• 35% — half of 10%. 20% — double 10%. 25% — a quarter. 50% — a half.
• 4Any other % — build it from chunks: 23% = 10% + 10% + 1% + 1% + 1%.
• 5Write the chunks on paper and add them at the end.