Daily Math Hack: Master Percentages in Seconds
The Secret to Speed
In competitive exams like SSC, Banking, or Railways, every second counts. Calculating percentages the traditional way ($40/100 \times 70$) consumes precious time.
The Golden Rule: When both numbers end in a zero, simply multiply the first digits of each number.
Examples:
- 40% of 70: 4 x 7 = 28
- 60% of 80: 6 x 8 = 48
- 30% of 20: 3 x 2 = 6
- 90% of 50: 9 x 5 = 45
Note: This trick is a massive time-saver for Data Interpretation questions where you need to compare values quickly without full calculation.
Practice Zone
Test your speed! Can you solve these in under 5 seconds?
- What is 20% of 40?
- What is 50% of 60?
- What is 70% of 90?
- What is 80% of 30?
- What is 40% of 50?
(Answers: 1=8, 2=30, 3=63, 4=24, 5=20)
