1MA0 Higher November 2012 Paper 2 Q16
16 Bill’s weight decreases from 64.8 kg to 59.3 kg.
Calculate the percentage decrease in Bill’s weight.
Give your answer correct to 3 significant figures. (3)
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(\dfrac{64.8 - 59.3}{64.8} \times 100\) (=8.487...) OR \(\dfrac{59.3}{64.8} \times 100\) = 91.512 100 – ‘91.512’ =8.487...) | 8.49 | 3 | M1 64.8 − 59.3 (=5.5) M1 (dep) \(\dfrac{\text{‘5.5’}}{64.8} \times 100\) oe A1 8.48 – 8.49 OR M1 \(\dfrac{59.3}{64.8} \times 100\) oe ( = 91.5(12...)) M1 (dep) 100 – ‘91.5’ A1 8.48 – 8.49 OR M1 \(\dfrac{59.3}{64.8}\) (=0.915(12...)) M1 (dep) 100 × (1 − ‘0.915’) A1 8.48 − 8.49 |