26% o f 125 = 100 26 ∗ 125 = = 4 26 ∗ 5 = = 2 13 ∗ 5 = = 2 65 → 32.5
1% = 0.01 ⇒ 26% = 26 ⋅ 1% = 26 ⋅ 0.01 = 0.26 26% o f 125 = 0.26 ⋅ 125 = 32.5
To estimate 26% of 125, we simplify it to 25% which is 31.25, and then add a little more for the 1%, resulting in an estimated value of about 32.5. This approach makes calculations easier by using round numbers. Using estimation helps to quickly approximate percentages in everyday situations.
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Penjelasan dengan langkah-langkah:misal sua buah bilangan x dan yx+y=56x 2 +y 2 =1600(x+y) 2 =x 2 +y 2 +2xy56 2 =1600+2xy3.136=1.600+2xy3.136−1.600=2xy1.536=2xymaka x X y= 21.536 =768 (D).