Percentage Tricks
Percentage Tricks
Trick 1: Convert % into fraction
- 125% = 5/4, 150% = 3/2, 250% = 5/2, 75% = 3/4, 200% = 2, 50% = ½, 25% = ¼, 12.5% = 1/8, 37.5 % = 3/8
Then multiply easily
Trick 2: 125%
125% = × 1.25 = × 5 ÷ 4
Ex: 125% of 32 = 32 ÷ 4 × 5 = 40
Trick 3: 250% Shortcut
250% = × 2.5 = × 5 ÷ 2
Ex: 250% of 16 = 16 ÷ 2 × 5 = 40
Trick 4: Common % Memory Trick
Percentage → Multiply / Divide tricks
50%: Divide by 2 (÷2)
25%: Divide by 4 (÷4)
75%: Multiply by 3, then divide by 4 (×3 ÷4)
125%: Multiply by 5, then divide by 4 (×5 ÷4)
150%: Multiply by 3, then divide by 2 (×3 ÷2)
200%: Multiply by 2 (×2)
250%: Multiply by 5, then divide by 2 (×5 ÷2)
Exam Trick: Convert % into fraction → Reduce → Multiply & Divide
Quick Memory: 50 → ÷2, 25 → ÷4, 75 → ×3 ÷4, 125 → ×5 ÷4, 150 → ×3 ÷2, 200 → ×2, 250 → ×5 ÷2
Trick 5: Swap Trick: x% of y = y% of x
Ex: 125% of 32 = 32% of 125 = 4
Trick 6: Add Method (Mental Math)
Ex: 150% of 20 = 100% + 50% = 20 + 10 = 30
Q. To find 250% of 16:
1st : Convert percent to number
250% = 250 ÷ 100 = 2.5
2nd : Multiply
2.5 × 16 = 40
Ans: 40
Short trick: 250% = 2½ → 16 × 2½ = 40
Q. To find 125% of 32:
1st Convert percent to number
125% = 125 ÷ 100 = 1.25
2nd: Multiply
1.25 × 32 = 40
Ans: 40
Short trick: 125% = 5⁄4 → 32 × 5⁄4 = 40
Q. To find 125% of 24
125% = 5⁄4
24 × 5⁄4 = 30
Q. To find 150% of 20
150% = 3⁄2
20 × 3⁄2 = 30
Q. To find 250% of 12
250% = 5⁄2
12 × 5⁄2 = 30
Q. To find 75% of 40
75% = 3⁄4
40 × 3⁄4 = 30
Q. To find 200% of 15
200% = 2
15 × 2 = 30
Q. Find 37.5% of 200.
Trick: 37.5% = 3/8
3/8 of 200 = (200*3/8) = 600/8 = 75
Ans = 75